Waste of time and ears
Basically you can play or stop the frequency only 5 times if you have a free version. That’s ok even if it’s a bit overpriced… but at least let me PAUSE the horrible sound of a 1503 hz tone blasting my ears without having to pay 30 bucks. It’s clearly not a bug since you chose to put 5 up as a limit: being an odd number, it’s mathematical that the limit is always attained when a tone is blasting (2 clicks to play and pause a tone, 2 more to play and pause and 1 to play, and the sixth click to pause the tone is above the free version limit), preventing you from pausing it. The thing is that’s not even good for your marketing, it’s just annoying because any human that has ears will just close the app, they won’t stand there and put their bank information while the tone is still playing, and that’s assuming anyone would want to pay 30 bucks. Sorry I am being rude though, keep up the work 👍