How many smartwatches can I pair with the app at one time? iOS: Only one watch can be paired with the app at a time. ANDROID: Multiple watches can be paired with the app simultaneously. Related articles Is my Citizen Clock an Eco-Drive? How do I get a manual for my watch? User Manual for CZ Smart Gen2 Hybrid Smartwatches (YF30) How Do I pair my Gen1 Hybrid Smartwatch?