Buying 50$ Android App (Database phoneNumbers, Sending Message to many at once)

I had in mind to create an android application but been struggling with database calls.
MY BUDGET IS 50$
The application must be coded in SDK Eclipse,

The app functions:

-Feature of adding phone number manually on a textbox and store it in database,

-Feature of creating text message and has send button, message will be sent in all of the phone number that was added in database

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I can add 10$ if there is a user and password set to admin and admin upon the installation of the app, and additional feature to change the pass after logged in as admin admin.

50$ only possible for 60$ thanks