Check out the Fossil Hybrid line of watches, I have one and love it (although it does more than you require) If you use Android then they're completely hackabl

Check out the Fossil Hybrid line of watches, I have one and love it (although it does more than you require) If you use Android then they're completely hackable with alternative open-source firmware[1]. Actually if you follow the link there's a whole list of hackable watches you could check out 1: https://www.gadgetbridge.org/ https://www.gadgetbridge.org/