Lets assume you decide that you want to either make the app profitable or kill it, and the assumption world is simple so there are no other concerns (like eg. you are having fun running a 5 star app): its profit or die.
Given that assumption what would prevent you from changing the app into a subscription based app ("service")? You could notify all your users that from date x/y there will be a monthly fee to use the app. You put it into effect and 99% of your users leave the app. The interesting question left is if remaining useres*monthly fee > monthly cost of app.
Lets assume you decide that you want to either make the app profitable or kill it, and the assumption world is simple so there are no other concerns (like eg. you are having fun running a 5 star app): its profit or die.
Given that assumption what would prevent you from changing the app into a subscription based app ("service")? You could notify all your users that from date x/y there will be a monthly fee to use the app. You put it into effect and 99% of your users leave the app. The interesting question left is if remaining useres*monthly fee > monthly cost of app.
Why would that not be an option for you?