2 years. I built ( https://itunes.apple.com/app/id714882169?mt=8 https://itunes.apple.com/app/id714882169?mt=8 ) three years ago as an idea to test shooting vid

2 years. I built ( https://itunes.apple.com/app/id714882169?mt=8 https://itunes.apple.com/app/id714882169?mt=8 ) three years ago as an idea to test shooting videos at 60fps on the iPhone. At the time there was no iPhone 6 and you couldn't shoot 60fps videos with the default camera app. I did zero advertising of the app, and it's currently bringing in around $100/month. I have a major update that I've been working on for the last 2 months, but other than that it seems to be running all by itself.