Today's Free App of the Day is Give My Ball Back
Originally $0.99

The review average on this game isn't very high; there are a lot of concerns about privacy. Game play seems to be okay as far as it goes.

From the product page:

Rack your brains and try to get back the ball someone stole from you through funny, colorful and frenzied levels. Tobias is a curious kid. While he is peacefully playing in his room, his favorite ball mysteriously disappears in his wardrobe. He rushes to get it back and is hurled into Moco's world, the mischievous shadow who took his toy.

Fight for the ball by alternately embodying Tobias and Moco through more than 40 levels which will severely test your logic. Dodge the traps cleverly set by the other one by successively activating objects, toys and animals to ultimately recover your ball without getting caught. And make sure you don't forget to look for the stars hidden in each scene to unlock bonus levels.

2 of 5 reviews are four stars and above.

So we have a bonus pick: Sworkit - Circuit Training Workouts.

This is a well reviewed app that lets you do "circuit" style training at home.

NOTE: This app and the Pro version are not compatible with the original Fire, sorry.

From the product page:

Sworkit provides randomized circuit training workouts to keep you motivated to exercise and stay fit. You can choose your workout length and target different areas to create the perfect workout anywhere, anytime. No weights or extra equipment required. Targeted workouts for Upper Body, Lower Body, Core Strength, Back Strength, Stretching Only, and Yoga. Create your own Custom Workouts using any exercises in our library for a fully personalized experience. Great for focused workouts, injury recovery, and new challenges.

40 of 41 reviews are four stars and above.

There is also Sworkit Pro ($0.99) which includes audible announcement of exercises, saving multiple custom workouts,customization settings, and bonus workouts like Boot Camp, 7-Minute Workout, Bring the Pain.

These apps, except as noted, are compatible with the original Fire and with my Fire HDXs. To tell if an app works for your Fire HD or other Android device registered to your Amazon account, click on the above link and look on the right side of the web page. Amazon will tell you if it will work with your registered device.

Have fun!

Also check out the other digital deals from Amazon, including great deals on MP3s and videos: