The only ones that I use:
- Just the watch face, to see what time it is
- The stock weather app (or, at least, its complication)
- Workouts
- Overcast, to start podcasts on my iPhone when the phone is in my pocket
- Timer
- Activity app (complication only - I rarely open the app)
- Heartrate complication
- Alarms (rare, but I use one maybe once a month)
- I rarely use it on the watch, but, DarkSky
Other apps that I rarely use on the watch, but depend on watch data:
- AutoSleep
- HeartWatch
- Activity app on the iPhone, to get and record workout data
- Maps (only to get turn by turn when I start navigation on the iPhone)
Apps I never use (and never will)
- Walkie-Talkie (I wish that this was an optional install that you could choose when you activate)
- Podcasts
- Radio
- Cycle Tracking
- Compass
- Calculator
- Audiobooks
- Remote
- Voice Memos
- Wallet/Apple Pay (I will always do this on my iPhone)