It's secure to download Transponder SMS. Transponder AS is the developer of this application which can be found in the Communication category. On Google Play, the app has been rated 4.2 by its users.
The latest update of this application was released on Jun 8, 2018 and Transponder SMS was downloaded by over 50K users. It's free to get the installer of Transponder SMS, also, you can have a look at users' reviews on Droid Informer. The app runs on Android 4.4 and above.