This is the Autumn Theme add-on to the chompSMS application. Once installed, access the theme in chompSMS > Settings > Theme It! Note: requires at least chompSMS version 6. 31.
The antivirus report indicates that this application is totally safe. Delicious is the official developer of the app which can be found in the Personalization category. The overall score for Autumn Theme is 4.3 on Google Play.
The most recent update of the app was released on Aug 31, 2015 and this application was downloaded by over 10K users. Take the opportunity to get the .apk installer of Autumn Theme 1.4 free of charge and have a look at users' reviews on Droid Informer. This installation package occupies 3 MB on disk and it can be launched on Android devices 2.2 and above.