Can I add membership cards to my Amazfit T-Rex 3?

You can add up to 20 membership or loyalty cards by scanning their barcodes or QR codes into the Zepp app and synchronizing them to the watch. Supported formats include Code 128, QR code, and EAN 13 among others. Once added, you can simply tap the Membership Card app on your watch to display the digital barcode for scanning at checkout.