What you need
- An iPhone with iOS 18 or later.
- Which Boob? 3.0, free on the App Store. Open it once after you install it.
Control Center and the Lock Screen
- Swipe down from the top-right corner of the screen to open Control Center, touch and hold an empty space, then tap Add a Control.
- Search for Which Boob? and tap Log Left Feed. Do the same for Log Right Feed, so either side is one tap away.
- To put them on the Lock Screen instead, touch and hold the Lock Screen, tap Customize, and choose the Lock Screen. Tap the minus on one of the buttons at the bottom to remove it, then tap the plus and choose Log Left Feed or Log Right Feed.
The Action button
- Open the Settings app and tap Action Button.
- Swipe to Controls, tap Choose a Control, and pick Log Left Feed or Log Right Feed.
A Home Screen widget
- Touch and hold an empty part of the Home Screen, tap Edit, then Add Widget, and search for Which Boob?
- Choose the small widget, with L and R buttons, or the medium one, with Left Boob and Right Boob buttons. Tap Add Widget, then Done.
- For the Lock Screen, the round and rectangular widgets show the last side and how long ago.
Siri and the app icon
- Say “Log left in Which Boob” or “Log the right side in Which Boob”. Ask “Which side is next in Which Boob” to hear the answer.
- Or touch and hold the Which Boob? icon on the Home Screen, then choose a side.
What happens next
- The feed is logged straight away, and the widgets, your Apple Watch and anyone you share with see it too.
- Next time you open the app, it's at the top of the list. If it went on the wrong side, touch and hold it to change it.
Good to know
- The Action button needs an iPhone that has one, such as iPhone 15 Pro or any iPhone 16 or later.
- Widgets and controls log the feed for now. To log one from earlier, open the app and change its time.
Checked against Which Boob? 3.0 on 8 November 2026. Something different on your iPhone? Let me know.