Pregnancy widgets for iPhone: your week on the lock screen
You will check your pregnancy week hundreds of times over nine months. A widget puts the answer where you already look — the home screen and the lock screen — so you stop opening an app to read one number. Here is which size shows what, how to add each one, and what to do when a widget goes stale.
The short version
- Six widget slots matter: three home screen sizes and three lock screen styles.
- Lock screen widgets are the ones you will actually use — visible every time you raise the phone.
- Widgets are snapshots, not live apps. That is why they cost almost no battery, and also why they can briefly lag a day.
- A widget backed by on-device data keeps working with no signal; a server-backed one goes stale.
What a pregnancy widget should show
There are exactly three things people re-check during pregnancy, and a good widget answers all of them without a tap: what week you are on, ideally with the day ("Week 20 +3"), how big your baby is this week, and how long until the due date. Anything else is decoration competing for a very small canvas.
The day number matters more than it looks. "Week 20" covers a full seven days, and around scan appointments and the 37-week mark, the difference between day 0 and day 6 is the difference between two conversations with your midwife. If a widget only shows the week, it is throwing away the more precise half of the answer. (The how many weeks pregnant am I guide explains why the counting starts where it does.)
Which widget size shows what
iOS gives developers six shapes to work with, and each one has a hard size budget. This is what realistically fits in each:
| Widget | Where it lives | What fits | Best for |
|---|---|---|---|
| Small | Home screen | Week + day, baby size comparison | A single glanceable tile among your apps |
| Medium | Home screen | Week, size, due date and countdown | The everyday default |
| Large | Home screen | All of the above plus progress and length/weight | A dedicated pregnancy page |
| Circular | Lock screen | Week number in a progress ring | Sharing the row with other widgets |
| Rectangular | Lock screen | Week, day, size name, progress | The most informative lock screen option |
| Inline | Lock screen, above the clock | One short line of text | Keeping the widget slots free for other apps |
Lunera ships all six. Many pregnancy apps offer home screen sizes only, so it is worth checking the App Store screenshots for a lock screen example before installing.
How to add a home screen widget
- Press and hold an empty area of the home screen until the icons start to jiggle.
- Tap Edit in the top-left corner, then Add Widget. On older iOS versions this is a + button in the same corner.
- Search for your pregnancy app by name and tap it.
- Swipe between the small, medium and large previews, then tap Add Widget.
- Drag it where you want it and tap Done.
If the app does not appear in the search, open it once first. iOS only lists widgets for apps that have been launched at least once since installing.
How to add a lock screen widget
- Wake the iPhone but do not unlock into the home screen, then press and hold anywhere on the lock screen until the wallpaper gallery appears. (You may be asked for Face ID or your passcode first.)
- Tap Customize below the lock screen you want to change, then choose Lock Screen.
- Tap the widget area directly under the clock. The picker opens.
- Find your pregnancy app and tap the style you want — circular, rectangular, or inline. Inline is added by tapping the slim area above the clock instead.
- Tap Done, then Set as Wallpaper Pair if prompted.
The lock screen row holds a limited number of widgets — a rectangular widget takes the space of two circular ones — so you are choosing between a pregnancy widget and something else. In my experience most people run one rectangular pregnancy widget and nothing else, because it answers the question completely.
Two extras worth knowing about
Control Center and the Action Button. Since iOS 18 apps can offer controls, which you add by pressing and holding Control Center, tapping Add a Control and picking from the gallery. The same control can be assigned to the Action Button on an iPhone 15 Pro or later, under Settings → Action Button. Lunera offers a control that shows your current week and opens the app on the tap — handy during labor, when you would rather press one physical button than find an icon.
StandBy. Put the iPhone on a charger on its side in landscape and iOS 17 and later show StandBy, a bedside display that can hold widgets. A pregnancy widget there quietly becomes the first thing you see in the morning, which is a nicer daily ritual than opening an app.
How widgets actually refresh (and why the battery is fine)
This is the part that explains most widget confusion, so it is worth one honest paragraph from the implementation side.
An iOS widget is not a running app. The app hands the system a timeline — a set of pre-rendered snapshots with the times they should be shown — and iOS displays them and asks for more when it chooses to. The app is not awake behind the widget, does not poll, and does not hold the CPU. That is why a widget's battery cost is essentially nothing, and it is the correct answer to the "do widgets drain battery" worry.
The trade-off is that you do not control the refresh moment. The system budgets reloads across all widgets on the phone, and Low Power Mode tightens that budget further. For a pregnancy widget this hardly matters, because the content only needs to change once a day at midnight — but it does explain the occasional widget that is a few hours behind after the phone has been idle overnight. Opening the app always forces a fresh snapshot.
One design consequence worth calling out: because the week is computed from your start date, the calculation is pure arithmetic on the device. No network call, no server, nothing to fail. A widget built this way is correct in airplane mode, in a hospital basement, and on a plane — which is not true of widgets that pull content from a server.
When your widget shows the wrong week
- Open the app. This forces the widget to reload and fixes the large majority of cases immediately.
- Check Low Power Mode. It deliberately slows widget refreshes. The widget will catch up when you turn it off or charge the phone.
- Check Background App Refresh under Settings → General → Background App Refresh. With it off system-wide, widgets update less often.
- Confirm your start date in the app. A widget one week off across the board is almost always a wrong LMP or due date, not a widget bug. Recalculate it with the due date calculator and correct it in settings.
- Remove and re-add the widget. The blunt fix for a widget stuck blank or showing placeholder data.
- Restart the phone if it is still stuck. WidgetKit occasionally needs it, and it is faster than reinstalling.
Lunera's widgets: every size, updated every day
Lunera ships the complete set — home screen widgets in three sizes and all three lock screen styles (circular, rectangular, inline) — each showing your current week and day, baby size comparison, and due date countdown, refreshed automatically.
- Minimal design that fits into iOS rather than fighting it
- The weekly notification pairs with it: "Week 21 begins — your baby is about the size of a carrot"
- Timing contractions? A Live Activity takes over your lock screen and Dynamic Island for the session, so you can see the elapsed time without unlocking
- A Control Center control and Siri for when you would rather not hunt for an icon
- All of it computed on-device, so the widgets work with no signal
Widgets during labor: the Live Activity
Widgets are for the forty weeks. The day itself has a different tool: a Live Activity, the persistent card that sits on the lock screen and in the Dynamic Island while something is in progress.
During a contraction session, Lunera's Live Activity shows the running timer and how long ago the last contraction was, updating in real time rather than on a widget schedule — so you can leave the phone on the bed and read it without touching anything. It is the one moment in pregnancy where a glanceable display genuinely matters, and it is covered properly in the guide to timing contractions.
Quick answers
How do I put my pregnancy week on my iPhone lock screen?
Press and hold the lock screen, tap Customize, choose Lock Screen, tap the widget area under the clock, and add your pregnancy app's widget. Circular shows the week as a ring, rectangular adds baby size and progress, and inline puts one line of text above the clock.
Do pregnancy widgets drain battery?
No. iOS widgets are pre-rendered snapshots refreshed on a schedule, not apps running in the background. A pregnancy widget only needs to change once a day, so the battery impact is negligible.
Why is my pregnancy widget showing the wrong week?
Widgets show the last snapshot iOS rendered, and the system decides when to refresh. Opening the app forces a reload. If it stays wrong, check Low Power Mode and Background App Refresh, then remove and re-add the widget — and confirm your start date, since a consistent one-week error is usually a wrong date rather than a widget fault.
Which lock screen widget size should I use?
Circular if you want the week at a glance beside other widgets, rectangular if you also want the baby size comparison and progress, inline if you would rather keep the widget slots free and read one line above the clock.
Can I see my pregnancy week without unlocking my phone?
Yes. Lock screen widgets appear whenever the screen wakes, so raising the phone shows your week, baby size and countdown. In StandBy — charging on its side in landscape — the widget stays on as a bedside display.
Do pregnancy widgets work offline?
A widget backed by on-device data does. Lunera calculates your week from your start date on the phone, so the widgets keep working in airplane mode or with no signal. Widgets that fetch content from a server go stale without a connection.
Track your pregnancy with Lunera
Week-by-week baby development, due date countdown, widgets, and a one-tap contraction timer — free, private, and subscription-free on iPhone.
This guide is for informational and educational purposes only and is not medical advice. Lunera is not a medical device. Always consult your doctor, midwife, or healthcare provider with any questions about your pregnancy or labor.