simple rev gen applicaton to test the waters

i would like a simple revenue generating app on ios and android to just test the waters, i would like the ap to be able to receive in app purchase's but that's okay if it does not, i would also like to at least have admob or ad sense integrated into the app. any ideas or already pre made app would be ok this is simply just a rough draft app that i would like to launch and see how it does using admob or ad sense