I'm thinking about starting to develop apps and I think I might start with a money tracker but if the features I have in mind are already in one I'm not going to. Here they are: - Lock Screen (I don't want anyone to be able to view my transaction log, I'll be logging all money I gain and all money I spend). - Simple input, I really want to be able to add a transaction simply, all additional info isn't important to me. I'd like it to recognize dates though so I can see my +/- weekly, monthly, overall, etc.. That's really it, I want it to be a simple process that I can do on the go, maybe a memo field on the new transaction page. All the ones I found are really weighted down. Is there a simple one that you think I'd like or should I try to make this my first app?