You won't make any money that way. I know a guy who does that - he makes $300 a year. By charging for less useful stuff, I make more than $300 a day. Just add

You won't make any money that way. I know a guy who does that - he makes $300 a year. By charging for less useful stuff, I make more than $300 a day. Just add some small feature like adding todo by email and make a pro version and charge $5. The people who love your app will glady support you. When you spend more than 2 weeks on a feature, put it in the 'pro' package. Take a look at how todoist.com is doing it.