what's the weirdest, most niche app you've ever downloaded?

You know, the kind that makes you go "I can't believe someone made this!" I'll start: I once found an app that just plays different doorbell sounds. That's it. That's the whole app. 😂 What's your bizarre app discovery? Bonus points if you still use it! Let's see who's got the strangest find! 🕵️‍♀️📱"