I just had an email stating that One Drop is now available for Android! If anyone is looking for a good app to log carbs, exercise, medication, HBA1C and of course BG this is a solid app. It is also free with no ads (well not on iOS anyway I cant check this version out but I am confident it should be the same!
Its been out on iOS for a good while and they have now made it for android. Different apps for different operating systems but should be almost identical in function.