RDFit

Connect an Android phone to IW7 MAX or PS9Ultra2 smartwatches over Bluetooth with RDFit. With permission, the app sends SMS and other app notifications to the watch, where you can read them and manage incoming calls by answering, rejecting, or replying by SMS.

RDFit also lets you place calls using the watch’s address book. Alongside these communication features, it records and evaluates daily activity, including steps, sleep, and heart rate, to help you monitor everyday habits.

Its focus is the combination of smartwatch communication and personal activity tracking in one companion app. The health features are intended for general fitness and wellness, not medical use.