Anyone use Navmode app?

Just saw a Navmode app on Android
Wondering if anyone has purchased it before. Its for studying for licenses

Ive been using it quite often. Just set for my license last month and passed. It was helpful when i just wanted to crunch for a couple of min before bed, class, watch or whenever.

Is it available for kindle.

yea i believe that kindle uses android OS so you should be able to use it. Look under google play “NavMode”

Thanks for the replies!