Today's Free App of the Day is Knots 3D
This is another repeat of a Free App of the Day, from September 2014.
It's a well-reviewed app on how to tie knots. Several reviews cite using it to teach scout troops. I don't see any consistent complaints about permissions--there are some from very old reviews, but nothing current. If you need to learn to tie knots, this looks like a good one!
488 of 582 reviews are four stars and above.
Compatibility of apps varies. To tell if an app works for your Fire tablet or other Android device registered to your Amazon account, click on the above link and look on the right side of the web page for the "compatible devices" link.
Also check out the other digital deals from Amazon, including great deals on MP3s and videos: