Pre Appointment App for Property Registration

We are looking to get developed an Android App and Windows application where people could book their appointment before the visit to registrar office the registration of property. App will work like [login to view URL] Similarly there will be two options of signup and signin. User will first signup and then an activation will go to their mail and after activating their mail it will give them access to login. Once they log in, they will have to create the profile of property owner in which they will have to fill their personal details and details about property also. In the details user will have to fill these details also stating the property sale and purchase conditions. "Free hold letter or other authorities clearance letter, Sale letter, Sale deed, Token amount, full payment, market value of the property etc". The details which we have to submit while filling up the form for taking the appointment. First of all there should be a sign up page as you saw on [login to view URL] There should be mobile number OTP authentication and email i.d activation. First Name and Last Name Father's Name Present Address Permanent Address Current Mobile Number Working Email i.d OTP Sent on Mobile Number Details of the Property Type of Property should be in drop down. DDA Flat Builder Floor Kothi Bunglow Villa Plot Mall/Complex Commercial Building Agriculture Land Godown Shop Others (If others then specify) Details of the seller First Name and Last Name Occupation PAN Number Aadhaar Number All Taxes Cleared Yes or Now Tick Electricity Bill Cleared Yes or Now Freehold Yes or No Stamp Duty Paid Yes or Now Any Dispute Yes or No if Yes the specify Market Value of Property Sale Value of Property Payment mode of Property Reason of selling the property Any criminal case against the seller of the property Yes or No if Yes then please specify Details of Purchaser First name and Last Name Father's Name PAN Card Number Aadhaar Number Present Address Permanent Address Mode of Payment Source of Payment Name of the Beneficiary of the Property Insurance of the Property Yes or No Any criminal cases against the purchaser Yes or No If yes then please specify Everything should be connected to our database. This should be hack free and all the data should be stored offline on local system. Other features I'll let you know after confirming to our client. For this thing I think one day is sufficient. These details are to be filled in a simple form and that form should be connected to our database. After filling these details, customer will have to pay 200 INR as convenience fees online and after that they will get the appointment schedule. There will be slots given on their system in the calendar and customer will have to click on any of the link and then a popup will be there stating that are your sure you want to book this appointment schedule? When customer will click on yes then all his details will be forwarded to that appointment schedule and his appointment letter with his concerned registrar will be generated and he can take the print out and same letter will be sent on the mail i.d of the registrar also. After validating both the letters, registration of the property will be done. There will be a Payment gateway also. and Online estamp selling ka API also.