What's a good Android app to learn basic sign language? Something actually reliable that I can use on my breaks at the clinic?

Okay, so I'm too tired to learn complicated apps, but Lingvano is actually reliable. I've been using it during my 15-minute breaks at the clinic to learn some basic ASL. It's like having a pocket reference guide, and it's been super helpful for communicating with a few of our patients who are hard of hearing. The no-fuss approach is exactly what I need after a long shift. I need something that works when I need it, you know? Plus, it hasn't crashed once in the six months I've had it, which is a HUGE win. It's got structured lessons, which I appreciate. Honestly, it's making a real difference in how I communicate with patients, and that's what matters most.