CarLetter reads your messages aloud using your phone’s native TTS engine. You can customize the voice speed, pitch, and even select a different engine from the Play Store (like Google WaveNet voices).
Connect your phone to the head unit via a high-quality USB cable . Open the app on the car's display .
| Feature | Carletter | Android Messages (Google) | Textra (with Auto plugin) | | :--- | :--- | :--- | :--- | | | Yes | Yes (RCS priority) | Yes | | In-car Quick Reply | Excellent (custom templates) | Good (basic replies) | Poor (requires workaround) | | Offline Functionality | Full | Limited without signal | Full | | APK Availability | Sideload only | Play Store | Play Store | | Best For | Power users who hate voice commands | Stock Android enthusiasts | Minimalists who rarely text |
Unlike standard Android Auto which provides a simplified, driver-safe interface, Carletter Cast mirrors your entire phone screen. This allows you to use apps not typically supported by Android Auto, such as YouTube or Netflix (though this should only be done while parked for safety).
: To enable seamless casting, the app requires access to your location, camera, microphone, Bluetooth, and storage. Customization
