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Mensis

Built by legal counsel and a privacy professional

Know your body, own your data.

From cycle to pregnancy, postpartum and beyond. Your health journey, all in one place.

The Today screen in Mensis: a ring showing cycle day 23 in the luteal phase, the days of the week above it, and below that cards to log symptoms and ask a question.

No data selling, no ads, no models trained on your data.

The core is free, and it's in the terms.

Download on the App StoreGet it on Google Play

For iPhone and Android

More than a period tracker

Understand your cycle, spot your patterns and keep your story in one place. And suddenly it all makes sense.

September 2026

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  1. The Mensis log sheet: period with four flow levels, mood as chips and energy in three settings, with a note that every tap is saved right away.

    Track

    One tap and it's saved. Even on days you can't be bothered.

  2. The daily insight in Mensis: the For you today card showing what you logged around this day in earlier cycles, a breathing exercise, and your cycle length, period length and variation side by side.

    Understand

    Tired out of nowhere? Your phase explains more than you think.

  3. The Insights screen of Mensis: your previous cycle, period length and variation, your cycle history with dates and a chart of your cycle lengths.

    Remember

    “Since when have you had this?” You'll know. To the day.

From cycle to menopause

One place for every phase

What you log travels with you to the next.

Read what each phase does

All six phases are in the app; postpartum and perimenopause are part of Premium.

After birth

The months when everyone looks at the baby

Maternity care ends, the questions don't. Mensis stays twelve months, for you.

Everything about the postpartum journey

Why this has to change

Millions of women logged their periods in an app. That app shared what they logged with Facebook.

Against the law, an American jury ruled in 2025.

California jury, August 2025. Read the report

That is why I am building Mensis. As a legal counsel and a certified privacy professional, I know exactly how this goes wrong, and how it should be done. By a woman, for women.

Price

The core is free and stays free

What is free at launch stays free.

Mensis

Freeforever

  • Logging, predictions, calendar and insights
  • Cycle, getting pregnant, contraception and without a period
  • Pregnancy mode: week, due date, weekly texts and weekly images
  • Report for your doctor in cycle mode
  • Three messages a day to the assistant
  • Export, deletion, app lock

Mensis Premium

From launch

€39.99per year (€3.33 a month), or €4.99 monthly

  • Postpartum, perimenopause, PCOS and endometriosis, the extended pregnancy mode
  • The entire deen module
  • A hundred messages a month to the assistant
  • Partner mode
  • Temperature from Apple Watch (iPhone) or Oura
  • PDF reports of the Premium modes

The first 7 days are free. Price and term are shown before you start.

Your patterns, in black and white

Mensis turns them into a PDF for your doctor, free in cycle mode: your cycle lengths, your spread and what you logged. No “about a month, I think”, but numbers.

No advertising, no data selling, no investor. Can't or won't pay? You keep everything that is free.

Ready to get to know your body?

The core of Mensis is free, with no advertising.

Download on the App StoreGet it on Google Play

For iPhone and Android

Mensis is not a medical device and not contraception. Predictions are estimates. Read more