Build iphone android blackberry apps jobs

I require a freelancer with expertise in developing interactive mobile app wireframes. The project focus is a productivity application with the central feature being Goals setting activity. Expected Deliverables: - An interactive wireframe of a productivity app - Main feature to in...mobile app wireframes. The project focus is a productivity application with the central feature being Goals setting activity. Expected Deliverables: - An interactive wireframe of a productivity app - Main feature to involve task management abilities Ideal skills and experience: - Proficiency in UX/UI design using Figma - Experience in developing interactive wireframes - Prior work on productivity apps Your proposal should detail your experience with such projects and your approach to task management...

I have an APK which is crucial for the security of my device. To prevent unauthorized deletion, I need a professional with advanced knowledge in Android development to implement an anti-uninstall feature. Key Requirements: - Implement an anti-uninstall feature that requires Root access. - Ensure the feature is discreet, and can't be easily bypassed. - Ensure the feature doesn't significantly impact the performance of the APK or the device.

I am looking to build a small web app, looking for professional android developer.

...need a professional who can help me customize the platform to meet the following requirements: - Develop custom bots for automation: I want to streamline our processes by implementing automated leave request approvals and calendar scheduling/reminders features. These will be crucial in ensuring that important tasks and approvals aren't missed. - Integrated apps and services: I am also interested in integrating additional apps and services within Teams. This is intended to make the platform more versatile and user-friendly for my team. You should have experience with Microsoft Teams' customization and integration capabilities. A background in developing chatbots or similar automation tools is a plus. You should be able to understand and translate my needs...

Please bid if you have Android development skills and CloudFront services experiences.

I am seeking a professional Android app developer to create a web application for me. Below are the specific features I want to include in the app: A. App Logo: I have the logo ready; you only need to integrate it into the app. B. Splash Screen Video: I possess the video for the splash screen; your task will be to incorporate it into the app. Screen: I already have a design for the homepage; I will provide you with further details via chat. D. Bottom Menu Navigation: Implement bottom menu navigation for easy access to different panels. Notes for the Developer: 1. App Compliance: Since I intend to publish this app on Google Play Store, it is crucial that the web app is developed in compliance with Google's standards. Additionally, please advise if integrating the web app wit...

I need the most simple Softphone/SIP app with my logo to use or another reseller voip/phone number provider so we can make calls in/out. I need this for Android, IOS, and PC/Mac. Simple app to call in/out. I need a custom softphone app (cross-platform) developed urgently. The app should be a simple dialer for both incoming and outgoing calls, and should be connected to servers. It's important that the app displays our company logo prominently. Key Requirements: - Development of a cross-platform softphone app - Integration with servers - Basic dialer functionality for both incoming and outgoing calls - Display of our company logo Ideal Skills: - Experience in softphone app development - Proficiency in cross-platform development - Ability to integrate with

I'm in need of people located in the United States to test and review some soci...in need of people located in the United States to test and review some social media apps on Android. As a potential tester, you don't need prior experience in testing apps or with social media platforms. I’m particularly interested in your general impression and thoughts on the usability of the apps you test. Key requirements include: - Residing in the United States - A willingness to test a variety of social media apps - Ability to provide a basic review focusing on general impression and usability No specific qualifications or expertise is required, just a good understanding of how to use social apps and a willingness to provide honest feedback...

I need a skilled developer to create a specialized iOS app for me. The app will allow me to access the target phone's live GPS location and view messages from messaging apps. Key Components: - GPS Tracking: I need to monitor the target phone's real-time location. This should be accurate and updated regularly. - Message Access: It's crucial for me to view messages from messaging apps on the target phone. This includes both incoming and outgoing messages. Key Features: - Stealth Mode: The app should be undetectable on the target phone. The target user should not be able to see that their phone is being monitored. - Secure Access: The app should provide a secure way for me to access the GPS location and messages. Only I should have access to this data. Ideal Sk...

...of a highly skilled Android developer who can efficiently set up and publish our app on the Google Play Store. The requirements are as follows: - Swiftly upload and publish the app on the Google Play Store My app is linked with my WP website with a key, i believe you have to follow a documentary to get it published, I'll provide you with the app file and the document as well as the Google developer email access and I'll be online if you need any help just need it today, if you can do that massage me! I've already created a developer account on the Google Play Store and setup it, the logo, description content, privacy policy, and full details of the app, so we're all set on that front. Your efficiency and previous experience in swiftly setting up and publi...

I'm in need of a mobile application that integrates a Voice AI Chatbot along with a comprehensive membership system. Key Features: - Voice AI Chatbot: The app should have a voice AI chatbot to assist users wit...media login, and subscription plan features. This is integral to offer exclusive services to our members. Ideal Skills & Experience: - Demonstrated experience in developing mobile applications with voice AI chatbots. - Proficiency in implementing membership systems with user registration, social media integration, and subscription plans. - Prior work on integrating push notifications into mobile apps. - Strong skills in UI/UX design and user-friendly interface development. - Knowledge of security and privacy best practices in relation to user registration and sub...

I'm in need of a QA specialist in America to conduct manual testing on my Android app. Here's what you need to know: - **Purpose**: The primary aim is to ensure the app's functionality and performance under various scenarios. - **Features**: The app should include login and registration functionalities. Your task will be to verify these features work as intended. - **Devices**: The app needs to be tested specifically on smartphones. Overall, I'm looking for someone who can systematically explore the app, identify potential issues, and provide detailed feedback on their findings. Experience with testing Android apps is essential. Strong communication skills are also important, as clear and concise reporting will be crucial.

I'm looking for a skilled developer with experience in food delivery apps to help me set up a comprehensive solution for my business. - **Features**: I need to integrate several key features including user registration and login, order tracking, payment gateway, inventory management, a seller app, a delivery agent app, an iOS app, an Android app, and a web app. The solution must provide a smooth and seamless experience for both customers and my team. - **Platform/Framework**: While I'm open to suggestions, I'm considering using scripts from Envato or Code Canyon as a base for this project. Any framework compatible with these scripts would be acceptable. - **Timeline**: I don't have a strict deadline for this project, but I'd appreciate if the work ...

I'm seeking for a professional app developer with precise experience in creating robust e-...creating robust e-commerce applications. The application ought to: - Enable shopping cart capabilities, allowing consumers to pick and store their desired items till check out Your expertise should include: - Profound experience in e-commerce application development - Previous work on both iOS and Android Platforms - Excellent knowledge in integrating shopping cart features into apps - Consistency in delivery of high-grade work The resultant application should be stable on both iOS and Android platforms, emphasizing a user-friendly interface that promotes an exceptional shopping experience for our users. Your portfolio evidencing similar past works would be fundamenta...

I'm in need of an experienced Android app developer to create and host an app for me. I haven't figured out all the details about the app's features yet, so your input would be greatly appreciated. I'm open to both options of design, either you providing it or me. The app should be user-friendly, responsive, and reliable. The developer should be able to guide me through the technical aspects and advise on the best user experience design. Skills and experience: - Proven track record in Android app development - Experience in app hosting - Strong understanding of user experience design - Ability to guide and advise on technical aspects

...WooCommerce, to create an app for my website. I need the app to function seamlessly on both iOS and Android platforms. Key features that I wish to incorporate include: - Customer Reviews: The ability for customers to leave feedback will provide invaluable insight and drive improvement. - Live Chat Support: This must be incorporated to enhance customer service and facilitate real-time assistance. Additionally, I need the app to integrate with third-party services such as: - Payment Gateway: To ensure secure and convenient transactions. - Shipping Service: For streamlined delivery processes. Ideal skills and experience include previous work with WooCommerce, proficiency in iOS and Android app development, third-party service integration, as well as creating customer revi...

I am looking for an experienced mobile app developer who can create a mobile e-commerce application for both iOS and Android platforms. The primary goal of this app is to provide a seamless shopping experience for users who watch videos on the platform. Key Features: - The app should offer both product selling and video streaming functionalities. - The product selling section should include a robust product search feature. This is crucial for helping users find and purchase products they discover while watching videos. Ideal Skills: - Proficiency in mobile app development for both iOS and Android. - Previous experience in developing e-commerce apps, especially those with integrated video streaming capabilities. - Strong understanding of UI/UX design principles to cr...

...“Turk’s Compass” Mobile App Development & Project Project Overview Project Name: “Turk’s Compass” Mobile App Development Project Budget: up to 500-1000 CAD Project Title: Project Abstract: Introducing "Turk’s Compass" – a ground-breaking Yellow Pages mobile app to serve as a “finder” for services/establishments and information. This mobile app should be released both on the Apple iOS and Google Android App Stores. Targeted audience of the application are: a) Entire Turkish community in Canada regardless of their city (Supporting major cities, such as Toronto, Montreal, Vancouver, Ottawa, London, Calgary, Regina) b) Anyone from Turkey wishing to immigrate to Canada. Project Plan: • Facilitate easy ...

...improved in Figma. See Journey - attached - Suggested Style, See Suggested attached, based on bloom app - Examples of designs There will be from 10 to 20 screens to convert to Figma. Requirements: - Provide the timeframe when you plan to start and finish it. - You will need to improve the designs and suggest the best practices for the app. - Proven experience designing iOS apps in Figma - Portfolio showcasing previous designs in the self-improvement or wellness industries preferred - Strong understanding of color theory and user interaction principles - Ability to balance user-centric design and visual appeal. Deliverables: - Clean, vibrant designs for all app screens - Design for habit tracker and daily journal features - Source files for all designs in Figma format

I'm searching for a proficient app develop...intuitive platform. Its primary function should be enabling people to rent out their recreational equipment to others within their vicinity, with fees determined by themselves. Key Features: - Must be accessible on iOS, Android, and Web. - The application should support different types of recreational equipment. However, specific types are yet to be determined. - Enable location-based, category-based, and keyword search for available equipment. Ideal Skills and Experience: - App Development for different platforms (iOS, Android, Web) - Experience in creating rental marketplace Apps - Ability to implement multiple search functions Your knowledge in this sector will contribute greatly to the project's success. Loo...

I have an android app and it's source code I need the following done 1. Some video file types are not loading. 2. I need the aspect ratio to be full screen by default I need those issues fixed and full written instructions what was done to fix the problem. Must be an expert in Android Studio

I have an android app and it's source code I need the following done 1. Some video file types are not loading. 2. I need the aspect ratio to be full screen by default I need those issues fixed and full written instructions what was done to fix the problem. Must be an expert in Android Studio

he developer should have the following skills and experience: 1. Proficient in Java, Kotlin and other programming languages; 2. Have a deep understanding of Android platform, familiar with Android SDK and related tools

I am in need of an Android application that primarily facilitates data collection and signature acquisition. Here are the key requirements: - **Touch Interface**: Users will interact with the app through touch on their mobile devices. The user experience should be intuitive and seamless. - **Template Creation**: The most critical feature for my app is the ability to create new templates for forms. The app should allow for the creation of custom forms based on various fields. - **Template Modification**: It would also be beneficial for users to have the option to modify existing templates, enabling flexibility in the forms they use. - **Exporting & Printing**: The app should be capable of exporting data in a user-friendly format, preferably as a PDF. Additionally, the ability to...

I'm in need of an experienced Google Play Console owner to help me with my mobile gaming app. Ideal Skills and Experience: - Extensive experience in publishing and managing mobile gaming apps on the Google Play Console. - Good understanding of the app store guidelines and requirements. - Ability to optimize app store listings for increased visibility and downloads. - Strong communication skills to discuss and negotiate offers. - Ability to provide guidance on improving the app. Looking forward to seeing the interested console developers. Please share your console link so we can discuss the offer further. Thank you.

I'm in search of a proficient freelancer who can develop a mobile app to be functional on both iOS and Android platforms. Since the primary function was not specified, creativity and ability to design multi-purpose apps will be highly appreciated. Key Requirements: - Strong experience in developing mobile apps for both iOS and Android - Proven experience in cross-platform mobile app development - Proficient coding skills in languages such as Swift, Kotlin, Objective C and Java - Exceptional UX/UI design skills - Strong problem-solving abilities, with a knack for complex troubleshooting tasks - Ability to work independently, with minimal supervision While delivering the final product, I'd also like you to provide the source code along with necess...

...aspect of the design reflects this goal. Key Responsibilities: - Designing a modern, minimalist UI for an Android platform - Ensuring the design elements embody the brand's ethos and enhance its visibility - Taking user experience into account for a seamless and engaging interface The ideal candidate should have: - Proven experience in UI design with a strong portfolio - Expertise in designing for Android platforms - Experience in creating designs that enhance brand visibility - A keen eye for modern, minimalist design - Excellent communication skills and a collaborative approach Please feel free to share any relevant work samples or portfolios that showcase your skills in modern Android UI design and brand visibility enhancement. I'm looking forward to...

I have a legitimate need to hack and mirror a person's phone for investigative purposes. I need this done as quickly as possible. Key project requirements: - The target device is an Samsung, running the latest android version. - The hacking and mirroring process should be discreet and undetectable by the phone's owner. - I need a report on the target device's activities, including text messages, calls, social media interactions, and GPS locations and apps. Ideal freelancer: - Proven experience in phone hacking and mirroring. - Sound understanding of iOS and the latest smartphone technologies. - Ability to deliver results quickly and discreetly. - A good track record of maintaining client confidentiality. Please include examples of your past work in your app...

...aspect of the design reflects this goal. Key Responsibilities: - Designing a modern, minimalist UI for an Android platform - Ensuring the design elements embody the brand's ethos and enhance its visibility - Taking user experience into account for a seamless and engaging interface The ideal candidate should have: - Proven experience in UI design with a strong portfolio - Expertise in designing for Android platforms - Experience in creating designs that enhance brand visibility - A keen eye for modern, minimalist design - Excellent communication skills and a collaborative approach Please feel free to share any relevant work samples or portfolios that showcase your skills in modern Android UI design and brand visibility enhancement. I'm looking forward to...

...incorporating product recommendations into responses to televant posts. A desirable candidate will have a wide understanding of enhancing visibility and creating engaging content for an app such as mine. Key Features: - Create promotional replies for Twitter and Instagram posts. - Prioritize in these replies our Android app product recommendation. - Understanding of social media algorithms and engagement strategies applicable to apps. - Proven experience in digital marketing, specifically for mobile apps. Please put the word SELECT (capetalized) at the top ofyour response, your bid will be ignored otherwise. Ideal Skills: - Proven record in Social Media Management. - App marketing. - Understanding Product Recommendation Strategies. - Out of the box thinker wh...

As your potential developer, I'm looking to create an engaging and practical iOS application that allows its users to choose items from a daily list and keeps track of these choices: Key Features: 1. User selection from a daily list 2. Counting daily selections/results 3. Sitting statistics pe...Counting daily selections/results 3. Sitting statistics per week with list Timeline: There is no immediate rush for project completion. Quality and functionality are the priorities. Skill Requirements: - Expertise in iOS app development - Understand UI/UX principles for optimal user-friendly design - Proficiency in integrating counting functionality - Experience with calendar or daily-tracking apps is a plus. If you can innovate while maintaining app simplicity, I look forward to s...

This project primarily revolves around gathering information from various mobile phones. The specific details about the type of information, desired platform, and brands were not specified, thus inferring that I am open to all options. The main focus areas are as follows: 1. Phone Model retrieval 2. Operating system detection 3. Storage capacity assessment Ideal Skills: - Proficiency in Android and iOS platforms - Competent knowledge of various phone brands including Apple, Samsung, Huawei - Detailed understanding of mobile phone technical specifications - Excellent problem-solving skills, given the absence of specific guidelines in this project setting. Experience: - Minimum 2-3 years with mobile application development or a related field. - Prior experience working on dat...

We are in search of a ZOHO expert available for hourly consultancy to assist us in mastering various ZOHO applications. Over the past 2-3 months, we've s...workflow. Our next step is to streamline and enhance our processes and pipelines by effectively linking these applications. Our goal is to engage in video calls with screen sharing sessions, where you will guide us through the optimal use of all features, focusing on refining and automating our processes. Confidentiality is paramount, as we aim to safeguard our customer information within the ZOHO apps. Therefore, this collaboration model is essential. We are looking to schedule 2-hour sessions, multiple times a week, on an ongoing basis. If you are proficient in ZOHO and have a knack for system optimization, we'd lo...

I need a proficient developer to build a hotel booking website and mobile app. Key Features: - The website and app should be developed for both Android and iOS platforms. - Main functionality includes a system for booking rooms. SEO: - I'm uncertain about the importance of SEO for this project and would value expert advice on this. Ideal Candidate: - Experience in app and website development is necessary. - Knowledge and skill in designing and developing booking systems is preferred. - Expertise in SEO is seen as an added advantage. I look forward to having a detailed discussion before finalizing the project scope.

I am in need of a skilled app developer to create a bespoke CRM mobile software that's user-friendly and appealing. This app will allow users t...Incorporating a feature to allow file sharing. - Push notifications: To keep users updated. Moreover, the application will include a Subscription Services feature for monthly recurring payments. Lastly, it will need a Referral Tracking feature. The tracking should be capable of determining the source of each referral. The ultimate developer for this project will possess strong experience in IOS and Android app development, especially with CRM applications. Superior knowledge of databases, UI/UX design and notification systems is crucial. Experience in implementing subscription payments and source-based referral tracking will be a m...

I'm looking for a skilled writer to help me with my master's thesis in the field of blockchain applications. The thesis should be substantial, with a word count exceeding 20,000 words. Key Requirements: - Proficiency in academic writing, especially in the field of blockchain - Experience with writing master's theses - Understanding of blockchain applications - Ability to conduct research and synthesize information Your main task will be to assist in the development of the thesis. This includes helping to define the research methodology to be used. Your ability to write in a clear, concise, and academically rigorous manner is essential. If you have a background in blockchain and have previously worked on academic writing, please get in touch. I look forward to discussing...

I need a highly professional, yet user-friendly e-commerce website developed using Magento open source, integrated with a mobile application built with Kotlin for Android and Swift for iOS. Key Aspects: - The main goal of this website and app is to sell physical products such as clothing, electronics and accessories online. - Both platforms must accept a variety of payment methods, including credit cards and PayPal, while also offering a cash on delivery option. Ideal Freelancer: - Extensive experience with Magento open source for e-commerce websites. - Proven proficiency in Kotlin for Android and Swift for iOS mobile app development. - Familiarity with incorporating diverse payment gateways. Your bid should clearly outline estimated timelines, proposed solutions and sim...

I'm seeking an experienced freelancer to debug and build my GitHub actions for 2 of my Android Java projects. The main task involves using building variants of my android application for the "development", "staging", and "production" environments which will all have separate API endpoints, package names, and app icons. Experienced Android Java programmers with a solid understanding of GitHub action builds, API implementation, and flexible design skills will be the ideal fit for this project.

Looking for an adept Flutter Developer with significant Machine Learning (ML) and Computer Vision (CV) capabilit...Flutter development, with a track record in ML and CV projects. - The ability to deliver completed work within tight deadlines is paramount. - Proven capability in creating imaginative and user-friendly mobile applications is desired. You should need to have experience using this package: or something similar and it should work for iOS and Android. You don't have to publish anything, I will be migrating your source code to another app as an extra feature, I'm also a Flutter developer but I need another hand. Please apply if you have the creativity and technical expertise we're looking for to bring this project to fruition.

...service app akin to uber. Both Android and iOS platforms are expected for development. I want to reassure you that UI/UX designs are already in place and will be made available to you once we commence the project. Your responsibilities will include, but may not be limited to: - Implementing payment for services - Integrating functionality for processing refunds - Enabling feature for viewing payment history Ideally, you will have strong experience in Flutter and a track record in successful integrations of payment gateways, specifically Mercado Pago/Mercado Pago Bricks, within mobile applications. Exceptional problem-solving skills and a keen eye for detail are also important for success in this project. Applicants with prior experience in developing apps for towing ser...

...execution to drive the highest ROI for the businesses and organizations that we serve. Who We Are Looking For The right person will be a dynamic and versatile copywriter who is capable of creating blog content pertaining to a variety of different industries. As a digital marketing agency with clients across the spectrum, these can range from ecommerce stores, SaaS tools, medical spas, mobile apps, service providers and many more. These blogs will be written with the specific purpose to compliment our SEO strategies, and will either be posted directly on the clients’ site, or on high-traffic blog channels across the web, as well as use search engine optimization strategies to write blog content that helps boost a website's search engine ranking. These blogs must con...

Brand Overview: AI Should be Easy. Simple, not complex. Our logo should reflect this simplicity an...mirroring 's innovative and trustworthy approach to AI solutions. It should balance being cutting-edge with accessibility, appealing to tech-savvy individuals while remaining welcoming to non-technical users. The tone should be serious and reliable, appropriate for a corporate audience. Application: The logo will be utilized across various mediums, including ’s web interface, mobile apps, print media, and potentially merchandise. It must be scalable to ensure its effectiveness from smaller scales like app icons to larger displays such as billboards or promotional banners. The design should function well in both full color and monochrome to suit different application needs...

I am searching for an experienced game app developer to build a game app inspired by UNO with a few noticeable differences. Essential Requirements: - The game must be built for both iOS (iPhone) and Android to reach a wide range of users. - Demonstrate proficiency in designing realistic graphical styles, as the game needs to have a real world feel. - Be capable of integrating online multiplayer functionality to offer users the ability to compete with players worldwide. Desired Skills: - Game design - iOS/Android app development - Graphic design - Multiplayer functionality - UI/UX design If you have the necessary skills and experience, I would like to see samples of previous work, especially those that involved multiplayer functionality. This promises to ...

I'm in need of a professional app developer to build a comprehensive fitness application. The app should cater to both iOS and Android users and encompass workout routines and activity tracking. Key Features: - Workout Routines: The app should offer the possibility for me to upload my video-exercises, classes, and different workout programs. - Activity Tracking: The app should have a built-in feature that allows users to track their daily activities and tasks. This can be done through checklists. - The app will need to be translated in two languages: English and Italian (I will be able to provide with the translation after the english part is finished). The app will not require integration with any third-party fitness trackers or devices. Skills and Experience: - Pr...

I am seeking a proficient app developer with Android platform experience to create a productivity-focused application. A comprehensive design of the app has already been completed, which will be shared to facilitate the development process. Key responsibilities: - Translating my design into a functional Android app. - Ensuring an efficient and user-friendly interface. - Testing the app and providing post-launch support. Required Skills: - Strong proficiency in Android software development. - Experience in producing productivity apps is a considerable advantage. - Ability to work to deadlines. - High attention to detail. I look forward to receiving your bids.

...enhance my existing website and develop mobile applications for both Android and iOS platforms. The ideal candidate should possess the following skills and experience: - Strong background in website and mobile applications development - Proficiency in implementing backend features such as User authentication, Database integration, and API integration - Capability to provide full control over the frontend of the website - Experience in implementing Commision Split extension - Ability to address existing website issues and improve its performance Your role will primarily involve: - Implementing requested backend features - Providing full control over the website's frontend - Designing and developing mobile applications for Android and iOS - Addressing existing websit...

I'm in need of a talented software developer experienced in creating desktop applications, API integration with eBay, and inventory management. The application will interface with aspects of my business (selling digital items) that are not typical for eBay, so off-the-shelf apps aren't capable of handling. It should be a standalone Windows app. Key features you should be able to develop: - Listing Quantity updates -- Update my local inventory count as items sell -- Pull from my local inventory files on demand and update quantities available on eBay accordingly - Order Tracking -- Alert on new orders -- Identify repeat customers -- Pull specific info from buyer note or buyer messages -- Help with fulfillment by pointing to locations inventory is available (i...

I'm in need of an expert mobile app developer with a keen eye for minimalist design. The task is very specific, revolving around the design of the UI/UX. The ideal candidate for this project should possess the following skills and experiences: - Proficient in creating minimalist UI/UX designs - Well-versed in Android app development - Ability to interpret user specifications accurately Design-wise, as stated above, I'm aiming for a minimalist aesthetic. Only those proficient in this style should apply. Your portfolio showcasing previous similar work will be highly crucial during the selection process. I look forward to your bid.

I'm looking for a developer who is well versed in API apps, Claude AI's API, and deploying chatbots on Wordpress websites. I have a comprehensive set of rules that work as a prompt in Claude to turn it into a game. The game functions well in Claude's environment, but I need it to be playable on the web. Possibly with ad serving capabilities so users can play for free Key Features: - Chatbot with (my already created) custom instructions, capable of having a back and forth conversation with users - ads or login feature for paid users in order to monetize Ideal Candidate: - Proficiency in using Claude API and Wordpress platform - Previous experience in building chatbots or chatbot games

My Android app has been removed from the Playstore due to a privacy policy violation. I need an experienced Android developer to help me with the following tasks: - Ensure my app complies with the latest Android 13 standards - Provide guidance on a privacy policy that includes all necessary disclosures about device and location data collection Ideal skills and experience for this job include: - Proficiency in Android development - Extensive experience in dealing with and resolving privacy policy issues - In-depth knowledge of the necessary disclosures for device and location data collection - Understanding of the Google Playstore's policies and guidelines