That's actually a fair point, regarding the implications of a one time fee. Personally, I don't like subscription-based apps so didn't want to create yet anoth

That's actually a fair point, regarding the implications of a one time fee. Personally, I don't like subscription-based apps so didn't want to create yet another one. And I built this around my personal needs so I plan to support it indefinitely. Regarding long term improvements, there is a number of paying users that once I achieve, any new users are basically profit. The service was built to be cheap to run and maintain so I could charge a one time fee.