day one

Period tracker · iOS and Android

Every day
makes sense.

Know which phase you are in and what comes next. Everything you log goes to the side nobody sees.

Join the beta
Cycle day
1

Your period

One tap on “Started today” and the predictions update. Log your flow and how you feel in seconds.

On your phoneDay 3 · cramps, tired, craving chocolate
The key stays here. It never leaves.

Even we can’t see
this side.

Real encryption, right now, in your browser.

On the server
No key, no date, no meaning.
Honest predictions

We don’t guess
a day.

We show you the real range, worked out from your own cycles. Move the slider to see what happens when cycles vary.

Period ~2 Nov± 2 days
22 Oct
2 Nov
13 Nov
RegularVariableIrregular

Regular cycle: ± 2 days. Your last six cycles sit close together.

For every stage

Not just for pregnancy.

  1. Just tracking

    Your day, your phase and what comes next, at a glance.

  2. Avoiding pregnancy

    A wider window and the warning, every time: it is not birth control.

  3. Trying to conceive

    Basal temperature, LH tests and mucus sharpen the window.

  4. Pill, ring, IUD

    The break and the withdrawal bleed, explained.

  5. Pregnancy

    Week by week, kicks and contractions.

  6. After birth

    No pressure to have a “normal” cycle.

  7. Perimenopause

    Changing cycles, hot flushes, honest ranges.

Beta · 30 places

Light it up
on your phone.

We are looking for 30 women with all kinds of cycles. We write once, when the beta starts.