Thank you for leaving a detailed description of what your app needs to include! It makes bidding on the project much easier.
While I'm more familiar with the PhoneGap/Cordova framework for cross-platform apps, the app you describe is simple to implement and can be easily done in Titanium instead. I have experience writing more complex cross-platform apps for clients such as archaeology firms that needed to collect data in remote field conditions (without cellular coverage) and then sync data with a parent database back in the office.
If you'd like to work with me, I suggest that you send me any resources you've created (such as UI drawings, any user stories, and any images or text to be used) and I will create a shared code repository so that you can see the project as I work on it. Once complete, you can both download the source code as well as a packaged version for Android and Windows devices. Because of the low cost for this project, I cannot immediately offer an iOS version unless you have an iOS developer account already.
Please let me know if you have any questions - I'd love to help you build your app and think it will be great fun to implement.
Best,
-Russell