The IOTA watch has a very responsive and functional but very small touchscreen. You can enter an IOTA address using a tiny scrolling keyboard on the watch, but it’s fiddly! To help prevent address typos the watch will warn you if an address you have entered has zero IOTAs on it.
So we’ve been working hard on an IOTA watch companion app; written in Microsoft Blazor (WASM) it should hot launch in the browser of any device with a camera. It allows you to use that devices camera to scan an IOTA address QR code and then send the address (via LAN) to your IOTA watch contact book. You can also paste or type a new address and send it to the IOTA watch.
Here’s a link to the companion app so you can test it today.