tu-ciclo

A quiet period tracker, made by a friend.

Log your days in a few taps, see your cycle, get an honest guess at the next one. No ads, no analytics, nothing sold — your data lives on one small server in Germany, and you can take it with you or delete it any time.

The calendar with a day sheet open below it — The calendar is the app: tap a day, the sheet is the editor.

A day's editor: flow, how you feel, symptoms, a note — Flow, mood, symptoms, a note — everything saves as you go.

Trends: the next periods with a likely window, and symptoms by phase — Predictions that say how sure they are, and what tends to come when.

What it is

Private by construction. One person runs it, for friends. No third party ever sees an entry; the privacy notice is one page, in plain words.
Honest about uncertainty. A prediction comes with its range, and if your cycles are irregular it says so instead of pretending.
Yours. Export everything as CSV or JSON whenever you like; delete the account and it is gone, backups included within 30 days.
Works like an app. Add it to your home screen on iPhone or Android; sign in with a code sent to your email, no password to remember.

How to get in

It's invite-only, by word of mouth. If a friend gave you a link, use that. Otherwise leave your email and I'll send you one — it's me reading these, not a system, so it can take a day or two.