I am in the planning stage for an Android application which will consume data from a Restful API (which I will write).  The data will be stored in a database (MySQL)

The data the API exposes will be captured from a website. Some of the data captured will be

venue name
venue address
venue telephone
venue website
opening times
.... some more

What I am wondering is if
a) BigTree can be customized to capture specific data (such as the above)
b) Can my API consume data from BigTree created tables? tables are not locked down or anything?
c) Is BigTree secure? Some data is sensitive (credit card info)

In short I need to create a website to capture data which will be retrieved via an API, and also data will be inserted into database tables from the app (two way communication).

Please let me know if you have questions.