Ondola: Contraction Timer
Parenting In-app purchases
Contraction timer for phone and Wear OS watch. No ads, no interruptions.
- Price
- Free
- In-app purchases
- Updated
- Nov 1
- 2026 · v1.0.1
Screenshots
About Ondola: Contraction Timer
Ondola is a calm contraction timer: one tap when a contraction starts, one tap when it ends. Your partner can tap on a Wear OS watch and keep both hands free to support you. Phone and watch share one timeline, without an account and without a server.
NOTHING IN YOUR WAY
No ads. No pop-ups, no upgrade screens and no requests for a review while you are timing. Not now, not later.
FIX A WRONG TAP, FOR FREE
Undo the last tap with one touch. Change the start or end of any contraction to the second, add one you forgot, or delete one. All free.
WHAT YOU SEE
- How long the current contraction has been going
- Length and time from start to start for every contraction
- Averages over the last hour
- Time since the last contraction
- Moments such as waters breaking, mucus plug, blood loss or calling your midwife
YOUR AGREEMENT, NOT OURS
Many midwives give a rule of thumb, such as 5-1-1. Enter what you agreed and Ondola lets you know when your contractions match it, with one message: call your midwife. We never suggest a rule ourselves and never tell you when to go anywhere. Home birth or hospital: you decide that with your midwife.
READY FOR THE PHONE CALL
The summary puts everything into short sentences you can read out to your midwife, with a button to call her.
QUICK TO REACH
Buttons in a notification, also on the lock screen. A Quick Settings tile. The app can open over the lock screen and keep the screen on. A dark theme for the night. Prefer the word "surge"? Switch it in the settings.
FULL VERSION, ONE PURCHASE
Ondola is free to install, and the whole timer on your phone stays free. One purchase, no subscription, adds:
- The Wear OS watch app with a tile: tap on the wrist and see it on the phone, and the other way round
- Strength and a note for each contraction
- A chart
- Sharing the summary as text
- Looking back at earlier series
PRIVATE BY DESIGN
Everything stays on your phone and watch. No account, no tracking, and the phone app has no internet access. Phone and watch talk to each other directly.
In doubt, bleeding, waters breaking or feeling the baby move less? Call your midwife or hospital straight away.
This app is a stopwatch with a summary. It is not a medical device and does not diagnose, treat, cure or prevent any condition. It gives no advice on what to do. Always follow the advice of your midwife or doctor.
Made by H4IT in Groningen, the Netherlands.
NOTHING IN YOUR WAY
No ads. No pop-ups, no upgrade screens and no requests for a review while you are timing. Not now, not later.
FIX A WRONG TAP, FOR FREE
Undo the last tap with one touch. Change the start or end of any contraction to the second, add one you forgot, or delete one. All free.
WHAT YOU SEE
- How long the current contraction has been going
- Length and time from start to start for every contraction
- Averages over the last hour
- Time since the last contraction
- Moments such as waters breaking, mucus plug, blood loss or calling your midwife
YOUR AGREEMENT, NOT OURS
Many midwives give a rule of thumb, such as 5-1-1. Enter what you agreed and Ondola lets you know when your contractions match it, with one message: call your midwife. We never suggest a rule ourselves and never tell you when to go anywhere. Home birth or hospital: you decide that with your midwife.
READY FOR THE PHONE CALL
The summary puts everything into short sentences you can read out to your midwife, with a button to call her.
QUICK TO REACH
Buttons in a notification, also on the lock screen. A Quick Settings tile. The app can open over the lock screen and keep the screen on. A dark theme for the night. Prefer the word "surge"? Switch it in the settings.
FULL VERSION, ONE PURCHASE
Ondola is free to install, and the whole timer on your phone stays free. One purchase, no subscription, adds:
- The Wear OS watch app with a tile: tap on the wrist and see it on the phone, and the other way round
- Strength and a note for each contraction
- A chart
- Sharing the summary as text
- Looking back at earlier series
PRIVATE BY DESIGN
Everything stays on your phone and watch. No account, no tracking, and the phone app has no internet access. Phone and watch talk to each other directly.
In doubt, bleeding, waters breaking or feeling the baby move less? Call your midwife or hospital straight away.
This app is a stopwatch with a summary. It is not a medical device and does not diagnose, treat, cure or prevent any condition. It gives no advice on what to do. Always follow the advice of your midwife or doctor.
Made by H4IT in Groningen, the Netherlands.
What’s new
Version 1.0.1 · Updated November 1, 2026
First version of Ondola: a contraction timer for your phone and Wear OS watch on one shared timeline. Undo and edit to the second, averages over the last hour, your own agreement with your midwife, a summary to read out, and buttons on the lock screen.