@atpfm @marcoarment I agree with John and Casey that you should go for it and approach this as a fun hobby. Don’t limit how long it takes to make, but do set a generous time period for how long you use it without releasing it publicly. Could be that after using it for 3 to 6 months, you end up going back to Remarkable because of the other advantages you outlined. It might be a great app for the iPad, and maybe you still release it anyway. But I just worry that putting it on the App Store could be a mistake if, six months later, you find yourself not using it yourself.