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ProtocolWatcher 1.15.0 for Android
Check the requirements below before installing — the USB requirement genuinely excludes some devices.
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Get the app
Google Play · Coming soon
The Play Store listing is not live yet. Leave your email address and we will tell you when it is — nothing else is sent to that address.
Demo Mode simulates every protocol, so the app can be evaluated without hardware.
Requirements
What your device needs
| Requirement | Detail |
|---|---|
| Android version | Android 11 or newer. |
| USB adapters | Require a device supporting USB OTG / host mode. The app declares USB host as required, so it will not appear in the Play Store on devices without it. |
| Bluetooth / Wi-Fi adapters | Need no USB support at all — Bluetooth Classic (SPP), Bluetooth LE and Wi-Fi/TCP adapters work on any supported device. |
If the listing does not appear on your phone, that is almost always the USB host requirement rather than a regional restriction.
Before buying hardware
Demo Mode
Demo Mode simulates every protocol — CAN and CAN FD, OBD-II, Modbus and serial — so the entire app can be evaluated before you buy an adapter or connect to a vehicle. All features are available during the 30-day trial.