What you need
- An Apple Watch with watchOS 11 or later, paired with your iPhone.
- Which Boob? 3.0 on that iPhone. The watch app comes with it.
Get the watch app
- If Which Boob? isn't on your watch already, open the Watch app on your iPhone.
- Tap My Watch, scroll down to Available Apps, and tap Install next to Which Boob?
Log a feed
- Open Which Boob? on your watch. It shows the side that's next, and when the last feed was.
- Tap Left or Right when you start a feed. Tapped the wrong one? Tap Undo straight after.
- Scroll down to see the feeds before it, under Earlier.
Put it on your watch face
- Touch and hold your watch face, then tap Edit.
- Swipe left to the complications, and tap the one you want to change.
- Choose Which Boob?, then press the Digital Crown and tap the face to finish.
What happens next
- Your watch passes the feed to your iPhone, and from there it reaches your other devices and your partner through iCloud.
- If your iPhone isn't nearby, your watch keeps the feed and passes it on the next time they're connected.
Good to know
- To change or delete a feed, use the iPhone app.
- Which complications you can add depends on the watch face.
Checked against Which Boob? 3.0 on 8 November 2026. Something different on your iPhone? Let me know.