Excellent post regarding the cost of updating your apps versus creating new apps. You have to have some sort of balance that works for you. Pierre has found great success as an indie, but after seeing a decrease in revenue in 2015, he realized spending the entire year updating apps cost him.
To Update, or Not Update Apps, That Is the Question by Pierre Abel
The big news this week, at least for those of us who absolutely love TextExpander, was their drastic shift to a subscription model. As a long time user, I both understand their goal, yet am disappointed with the implementation. I'm ok with a shift to subscription, but when you run the numbers of how much more the app will cost to continue using versus previous version, it's sticker shock. I'll keep using TextExpander as long as my version is supported, but can't see myself paying so much more than before for an app that has many worthy alternatives. How this turns out is something all developers need to pay attention to as the monetization models around the App Store continue to evolve.
TextExpander 6 and TextExpander.com by Michael Tsai