I haven't seen anyone post this yet; or I've missed it,

I haven’t seen anyone post this yet; or I’ve missed it, but not having a stopwatch was an issue for me on the X5. I’ve found that there is one built in on the KW88 (and over versions running 5.1 I guess).

In alarm clock, swipe right and there you have the stopwatch.

I’m sure other’s have spotted this but posting as it’s probably useful for others searching for features.

Simplest Stopwatch 2 in the Google Play Store should work on your watch, just as it does on the D5.

d.m.f.

i found several stopwatch apps for the x5. most are silly as they don’t fit the round format. try getting “digital timer”. the icon is black with green numbers.