Duo mobile cannot see your user data like your contacts, it cannot read your text messages, it cannot access your photos (but it can use your camera to scan a QR code if you explicitly allow that permission), it cannot access your files, it cannot erase your device, it cannot see information about other applications on your device. Duo mobile cannot track your location. In general, the only personal data that Duo mobile knows about you are the service accounts that you explicitly add to Duo mobile. However, we do not track any personal data about these accounts–only the name of the service.