Your cycle
The basis of PERIOD.
- Track your cycle and period
- Predictions of your period and fertile days
- Log symptoms
- A daily explanation of your phase
- Reminders
- Ask the assistant
PERIOD. The period tracker app that's actually built for women. Not for advertisers. Just for you.
SINCE 2026 · AMSTERDAM
NO ADS
NO DATA SALES
NO DATA SALES
#1
PERIOD TRACKER THAT DOESN'T SELL YOUR DATA
19 LANGUAGES
iPHONE & ANDROID
FOR EMPLOYERS →iPHONE & ANDROID
Built for women. Not for advertisers.
Built for women. Not for advertisers.
4.8on the App Store
100,000+women
NO ADS
NO DATA SALES
19 LANGUAGES
As seen in
What is PERIOD.?
PERIOD. is a period tracker app for iPhone and Android. It predicts your period and fertile days from your own cycles, explains what your body is doing each day, and stays with you through trying to conceive, pregnancy, perimenopause and menopause. There are no ads, your data is stored in the EU and it is never sold. Made in Amsterdam by Lisa Volkers and Diederick Trampe.
One app, every stage
Start with your cycle. Add what fits you later.
Your cycle
Your period, predictions, fertile days and reminders.
Learn morePERIOD. plus
Your own assistant, doctor report and complete fertility tracking.
Learn morePERIOD. baby
From trying to conceive to after birth.
Learn morePERIOD. meno
Perimenopause and menopause: hot flushes, your HRT and your doctor.
Learn morePERIOD. at work
For employers: plus for your whole team, anonymously.
Learn moreWhy this is different
- 01
Your data is yours
Many period apps make money from your health data. PERIOD. never does. No advertisers. No data trade. Period.
Cycle apps have repeatedly been caught sharing menstrual and pregnancy data with advertisers and big tech. Regulators stepped in. Lawsuits followed. PERIOD. doesn't play that game.
- 02
Built by Lisa
The industry designs apps to look 'feminine' rather than to actually work for women. PERIOD. is Lisa's idea. She uses it herself, every month, and knows exactly what's missing.
Pink tones and floral icons aren't product design for women.
- 03
Clarity first
Everything you need at a glance, in plain language: where you are in your cycle, what your body is doing and what you can expect. No clutter, no pop ups, no scare tactics. Understanding your own body should be simple.
You choose how the app talks to you, and it learns from your own cycles.
- 04
100,000+ women chose it before you
The first 10,000 arrived in less than two weeks, organically, without ad spend. Not because we're big, but because it works.
‘So nice to finally be able to log everything, without your data being sold. The app works really well and gives good tips.’ SHCup, App Store review
Sources: regulator findings and public reporting on the cycle tracking industry.
What you get in PERIOD.
PERIOD. plus
Subscription, price shown in the app
- Everything in your cycle
- Your own assistant that remembers your cycle
- Doctor report as PDF
- Insights across cycles
- Temperature, ovulation tests and cervical mucus
- Journal, custom symptoms, calendar and sharing with your partner
PERIOD. baby
Subscription, price shown in the app
- Everything in plus
- Your fertile window when trying to conceive
- Forty weeks of pregnancy, week by week
- Recovery after birth and breastfeeding
- Your midwife appointments in one place
PERIOD. meno
Subscription, price shown in the app
- Everything in plus
- Log hot flushes in one tap
- Track your HRT
- Report and visit script for your doctor
- Monthly check in
- Help in the moment
Employer? With PERIOD. at work your whole team gets plus, anonymously.
4.8
AVERAGE ON THE APP STORE
19
LANGUAGES
100K+
WOMEN USE PERIOD.
EU
YOUR DATA IN FRANKFURT
What users say
App Store
4.8
300+ ratings on the App Store
Real app reviews, translated from the original.
All reviews on the App StoreFinally a clear app without all the fuss. It is clear and has exactly the most important features. In one word: fantastic!!
Top
A very complete app with lots of features, but shown in a really easy, user friendly way so I am not searching all the time!
Really a good app
Really a good app where an ad for the pro version does not pop up every two seconds. You can tell it was made by a woman for women, and every time you open the app you learn something new about your body. I found the app through a TikTok from the maker and deleted Flo, which I had used for years, straight away. Really great, more women like this in our world please! 🩷
Extensive, personal and professional
An app for women, made by and with women, and you can tell in everything. It is well put together, with extensive options to track your period and over time even personal predictions. What a breath of fresh air this app is. Thanks for making it! 💗
Perfect
Amazing app! Clear, informative, transparent and easy to use. I immediately deleted my old cycle app Clue. Really reassuring that my data is finally treated confidentially.
Best app for your cycle
Really lovely app. One that simply looks calm, asks the right questions and gives good tips. And so nice that it comes without weird ads. Exactly what I was looking for and needed!
Really great app
For the first time a period app I am genuinely happy with. No weird ads, strange colours or patterns. Just a clean design, with useful information that makes your cycle understandable.
In the press
What they're writing about PERIOD.
Featured · Algemeen Dagblad
“Wij zullen nooit data doorverkopen.”
Read the article
“An app cannot lose, sell or hand over what it never asked for.”
Read the article
“Dat ik deze frustratie met zoveel andere meiden en vrouwen deelde, had ik nooit verwacht.”
Read the article
“Uit frustratie. Ik was 29 en wist niets van mijn cyclus.”
Read the article
“Seks, rugpijn en menstruatie: cyclusapps halen miljoenen op met intieme informatie.”
Read the article
“Wij vogelen uit hoe je intieme data veilig beheert.”
Read the article
“Ik wil niet dat er geld wordt verdiend aan data van vrouwen.”
Read the article