Is there a stopwatch or timer on the band?

Yes, in the Tools function.

With the 2.13 Wyze app update, your Wyze Band now has the Stopwatch feature. You can enable it under the Tools function in the Wyze app.

To enable the Stopwatch function:

1. In the Wyze app, tap Wyze Band.
2. Tap the plus + sign to add a function to your band.
3. Tap the plus + sign next to Tools.
4. Tap Save.
5. Tap on the Tools function to open it.
6. Next to Stopwatch, tap the toggle to On.

You can now use the Stopwatch on your Wyze Band.