I am looking for a developer to help with the creation of a simple cross-platform database app for use in free apps to be used in smartphones.

Users will use an index to look for answers from a database which currently exists in the form of an excel file. This aspect of the app will be standalone and will not require the user to be online.

The app will also require them to register and respond to a few questions on an exiting survey database. Based on the responses given by the users, they will receive one of a set of predetermined answers drawn from that api.

In addition, there might also be a voting aspect. Users are invited to give a vote of * - ***** to a product. Once they have voted, they will see the average vote given by others, ideally including the rating they have just given themselves.

Please quote for this task, breaking down the quote if necessary for individual aspects of the work. Please also let me see examples of phone apps of this kind you have already produced, with an explanation of precisely what you did for them.