The Main Time watch face only supports Wear OS smartwatches (OS version 8.0 and above). Does not support Tizen OS, Harmony OS and other smart watches.

The application on the phone is only needed to transfer battery level to the watch in the Main Time watch face.

Main Time watch face for smartwatch supports built-in complications:

- Weather with bad weather warning. You need to grant access to the location.

- Current date.

- World time.

- Financial data: currencies, cryptocurrencies (Bitcoin BTC, Ethereum ETH, etc.), stocks (AAPL, GOOG, etc.), futures (Gold, Brent oil, etc.), ETFs and indices (S&P) 500 etc.)

- Air pollution. Not all countries and regions are supported.

- Tides. Not all countries and regions are supported.

- Smartwatch sensor data: Heart rate, Barometer, SPO2 only for Ticwatch 3. You need to give access to body sensors on your smartwatch.

- For smartwatches running WearOS 3.0 and above only: Data from Health Services. You need to allow access to share information from your health program (such as Samsung Health) with Health Services on your smartwatch.

- Events from the Google calendar. You must grant access to read data from the calendar. Events that start in the next 10 hours are displayed. If you're using a different calendar, please sync it with your Google calendar.