This is the Pretty Theme add-on to the chompSMS application. Once installed, access the theme in chompSMS > Settings > Theme It! Note: requires at least chompSMS version 6. 30.
Chomp SMS Themes is the creator of the app that can be found in the Personalization category. Pretty Theme has been downloaded and set up by over 10K users and the latest release is dated Aug 31, 2015. The average rating for this application is 3.9 on Google Play.
A number of users installed the app on their Samsung and LG devices. It's free of charge to download the .apk file of Pretty Theme and you can check out users' reviews on Droid Informer. This application installation package requires 467 KB of free space to run on Android 2.2 and above. The security report shows that the app is safe.