I had a humidity switch in ours a while ago (not smart) and it would turn on too much even if a shower wasn’t running but our windows were open. And, enough humidity was in the air. So that didn’t work out great.
It was a self contained deal not a smart switch though
Been using enbrighten switches from Jasco. I use their Zwave but I think they have ZigBee too.
I use the ones that look like toggle switches over the paddle style to match the rest of the house .
I have them on all our bathroom fans too so they can be left on (steam / smell disposal) and auto shut off after 30 min.
I left Strava when they adjusted their ‘freemium’ model and hid a number of things behind a paywall. Now I just use Garmin Connect, for tracking my stuff and an ‘athletic’ social circle of friends via connections/news feed.