Calls blocker - white list - black list

I'm looking for someone to program an android app for me. The idea is described below: 1. Description: An app to block unwanted calls/sms (black list) or to allow calls/sms from certain numbers only (white list). ---------------------------- 2. Target audience: Anyone who sends/recieves calls and sms. -------------------------- 3. Some features: * Black list * White list * Auto reply with sms * Call log including blocked numbers * SMS scheduler ---------------------- 4. Similar applications in the market: * Call blocker * Extreme call blocker droid * Call control - Call blocker * BlackList ------------------- 5. Monetization There should be two versions of the app, one FREE and one paid. The FREE version will have some features blocked or limited. ----------------