Most of my use cases include converting values between currencies or measuring units. I mostly use Numi for that but having a simple tooltip is so much better.

Most of my use cases include converting values between currencies or measuring units. I mostly use Numi for that but having a simple tooltip is so much better. I also plan to use it for information that I can't memorize easily. Like a mapping between GPIO pins for microcontrollers, I never remember what pin does what. With this I can simply create a hashmap with something like GPIO23 as the key, and info about that pin as the value and have that always at my fingertips. Or things like displaying Google Maps urls for words that look like places, mail app urls for email addresses, Spotify search URI for artists etc. It's a very useful and powerful tool if you can come up with ideas for it.