I've been building a break reminder app for mac since slightly more than a year and it's been growing really well - mostly through word of mouth. It currently nets $5k a month.
I sell perpetual licenses but I charge for updates beyond the first year. I do get 2-3 emails every day reporting bugs and general feature requests.
I have some other apps for iOS as well but they are all subscription based.
I used to worry about it a lot but now I have made peace with it. It's a cat and mouse game. Pirates will always find a way no matter how hard you make it to crack. There's no way to make it impossible to crack.
I sell perpetual licenses but I charge for updates beyond the first year. I do get 2-3 emails every day reporting bugs and general feature requests.
I have some other apps for iOS as well but they are all subscription based.