I’ve been using PhET Simulations for a couple months now. It’s basically a collection of interactive science and math simulations made by experts. Pretty solid app if you’re into educational stuff.
Here’s what you can do: there’s sims on everything from atoms to energy to multiplication. You can play with them offline, which is super handy. It’s got a bunch of different languages too, which is great if you’re bilingual. Oh, and you can favorite the sims you like and make your own custom collection.
Look, if you’re a teacher or a student who’s into learning through simulations, you’ll probably like this. It’s not perfect – the ads can get kinda annoying if you don’t pay – but overall it does the job. Worth checking out.