Support. The Redmi Watch 5 Active supports use with both iOS and Android phones. To connect the watch, you need to bind it through the Mi Fitness APP. This APP is available for download in both Android and iOS application stores. You can search for and install the Mi Fitness APP on your phone, and then use it to pair with the watch. Alternatively, you can scan the QR code displayed on the watch’s binding interface to directly download the APP and complete the pairing process.