Privacy policy
The short version: we never see your pregnancy dates, names or your children’s data. The math runs on your device. We store only what the shared family features need, and we explain all of it here.
What stays on your device
These are never sent to us:
- Every date you type into a calculator, and every result.
- Your theme choice (light, dark or auto) and language, saved in your browser’s local storage.
- Your bump diary photos and notes, appointment questions, birth plan, checklists, caregiver card and other things you make with our tools.
- The secret “edit key” of a family page you created.
Results are kept in the part of the web address after the “#”. Browsers never send that part to any server, so we cannot see it.
Family pages: what the link contains
When you share a family page, the due date and the baby’s name or nickname are written inside the link, after the “#”. Anyone who has the link can see them, so share it only with people you trust. We do not store them.
What our small server stores
A few family features need a tiny database on our server. It stores:
| What | Why | How long |
|---|---|---|
| A random link ID and a scrambled (hashed) copy of the edit key | So only the parent can pause or manage the family page | Until the parent deletes it, and at most 24 months |
| Paused: yes or no | So the family page can show a gentle message when paused | Same as above |
| After the birth, only if the parent enters them: the birth date and weight | To show the family that the baby has arrived and to find the baby pool winner | Same as above |
| Guesses in the baby pool: a display name and the guessed date, and optionally weight and hair | To show the game to the family | Until the parent removes them, and at most 24 months |
| Messages to the baby: a display name and the message | Shown to the family only after the parent approves them | Until the parent deletes them, and at most 24 months |
| A scrambled (hashed) version of your IP address | To stop spam and abuse (rate limits) | At most 24 hours |
The server never stores the due date, the baby’s name, or any health information. Please do not put private information in display names or messages.
Contact form
If you write to us, your message (and your email address, if you give it) is sent to our mailbox so we can answer. We keep it only as long as needed to answer, and at most 12 months.
Hosting
Our website is hosted by Hostinger. Like every web host, its servers process technical data such as your IP address and browser type to deliver pages and keep the service secure.
Ads and cookies
Some pages may show up to two ads from Google AdSense. Google may use cookies to show and measure ads. In the European Economic Area, the UK and Switzerland, Google’s consent tool asks for your choice first; without consent, only limited ads are shown. Ads never receive your pregnancy dates. See our cookie policy.
There are no ads on sensitive pages, guides, legal pages or Kids Mode.
Tips
If you choose to tip, you pay on PayPal or Ko-fi, under their own privacy policy. We never see your card details.
Analytics
We do not use analytics today. If we add it later, it will be privacy-friendly, without cookies, and it will never see your dates. We will update this page first.
Children
Kids Mode for big brothers and sisters has no ads, no tracking and stores nothing. The child’s name stays inside the link or on the device.
Your rights
Wherever you live, you can ask to see, correct or delete data about you. Because we store almost nothing, there is usually nothing to find. To delete a family page, its guesses and messages, use “Manage link” on the page, or contact us. We answer within one month.
Your rights where you live
- European Union (GDPR): access, correction, deletion, restriction, objection and data portability. You can complain to your national data protection authority (European Data Protection Board).
- United Kingdom (UK GDPR): the same rights; you can complain to the Information Commissioner’s Office.
- California, USA (CCPA): the right to know, delete and correct, and to opt out of the sale or sharing of personal information. We do not sell personal information. Regulator: California Privacy Protection Agency.
- Brazil (LGPD): confirmation, access, correction, anonymisation or deletion, and information about sharing. Regulator: ANPD.
- South Korea (PIPA): access, correction, deletion and suspension of processing. Our privacy officer is Brahim Idoumskine, reachable through our contact page.
- India (DPDP Act 2023): access, correction and erasure, and grievance redress; you can contact us first, then the Data Protection Board (MeitY).
- Japan (APPI): disclosure, correction and stopping use. Regulator: Personal Information Protection Commission.
- Türkiye (KVKK): the rights in Article 11 of Law No. 6698. Regulator: KVKK.
- Morocco (law 09-08) and other countries: you have similar rights under your national law, and you can always contact us.
Russian-language pages: the family page’s guessing game and message wall are switched off, so these pages store no personal data on our server.
Who is responsible
The data controller is Brahim Idoumskine, 3 rue de Prague, 75012 Paris, France (support@mamarc.com). You can reach us through our contact page.
Last updated: October 25, 2026