That is rough. I assume this is a web application?
I went through a previous thought experiment about what would happen when we moved a paid up front feature behind a subscription. This was the outcome I came to. Unless the user bought and installed a physical app, on the desktop, outside of an app store, they were going to get the rug pulled out from under them.
Ugh, that happened to me too. But instead of researching other apps and waiting for them to decide to go premium too, I built my own workout app. Been using it for a couple months now and it's working great, but the hassle of publishing it to the app store means that it will only ever be a solution for me and I can't share it with anyone.
I actually started with it as a PWA, but ended up rewriting it in react-native. I wanted a couple features (heart rate monitor, lock screen integration) that afaik don't work with PWAs.
I went through a previous thought experiment about what would happen when we moved a paid up front feature behind a subscription. This was the outcome I came to. Unless the user bought and installed a physical app, on the desktop, outside of an app store, they were going to get the rug pulled out from under them.