Multitude of themes to customize your favorite messaging App

To apply in Telegram use option 'Share theme' and share it to your saved messages and from there you can apply it

If you are a Plus Messenger user, simply use 'Apply theme' option

Check and download themes from a multitude of users
Apply themes directly from the app (for Plus Messenger only)
Share your own themes
Receive new themes notifications
Classified in over 20 different categories
Contact the theme creator directly
Share direct links to any theme

Make sure that third-party apps are allowed on your device: go to Menu->Settings->Security-> and check "Unknown Sources"

Tap the APK file. Allow the app any required permissions it asks for. Then, at the bottom of the installer window, click INSTALL.

You'll see a confirmation the app is installed. Now you'll see the app available in your list of installed apps.