Today's Free App of the Day is PhotoVault
Originally $1.50

This is a photo security app. There are a lot of concerns that the app doesn't really provide security for your photos other than by someone casually picking up your device. Also, there are many one star reviews saying that they lost their photos when using the apps. I believe, from reading the reviews, that the app renames the photos with an app-specific extension so that they aren't found by the standard gallery app, and that makes it difficult for some people to find the pics if they remove the app without unlocking them. I'd be cautious about using this or any photo vault app unless you really need to secure your photos and the device security isn't sufficient. There's a risk of losing access to your photos. That being said, I've got another photo app that seems to have more features and fewer (proportionally) negatives reviews; though the ones that are there cite some of the same issues.

104 of 170 reviews are four stars and above.

So we have a bonus pick: F-Stop Media Gallery (Kindle Tablet Edition).

This is another photo vault app which is slightly better reviewed. You create a folder for the app to move your photos to. Some of the same concerns have been expressed in the one-star reviews--that your photos can be lost and aren't really secure. Note that this app is NOT compatible with the original Fire.

42 of 61 reviews are four stars and above.

These apps are compatible with the original Fire and with my Fire HDXs, except as noted above. 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: