First launch

Welcome in Mētra .

What happens on first launch

The first time you open Mētra, there is no account to create and no email to enter. Two screens, and you’re in.

Screen 1 — Welcome

Welcome screen: Mētra wordmark, manifesto, 'Get started' button.

You see the Mētra wordmark and a short manifesto about what the app is — and what it isn’t. Worth reading: it sets the frame before you log a single day.

Tap Get started to continue.

Screen 2 — Your baseline data

Setup screen with three fields: last period start date, average cycle length, and typical period duration.

Mētra asks for three things so it can start making predictions calibrated to your cycle:

Field	Default	What it means
First day of your last menstruation	current date	The first day of your most recent period. Tap the field to open the date picker.
Average cycle length	28 days	The number of days from the first day of one period to the first day of the next. Most people fall between 21 and 35 days.
Flow duration	5 days	How many days your period usually lasts.

Tap the date field to set when your last period started. Use the − and + buttons to adjust cycle length. These are starting points, not verdicts: Mētra refines its predictions from your data as you log cycles — not from anyone else’s.

Tap All set → to enter the app.

After first launch

You arrive on the Calendar tab. Today’s date is highlighted. The calendar already shows a predicted period window built from the numbers you just entered.

From here, everything you log is saved locally on your device. Mētra does not send this information anywhere.