Health tracking is infrastructure, not a luxury.

Masik is a period, fertility, and pregnancy tracker built on one rule: nothing is ever locked behind an upgrade. There's no premium tier, no trial period, no feature that shows up as a paywall — every account gets everything, from the day it's created.

Predictions are rule-based, not an opaque model — the calculation (a filtered rolling average of your own logged cycles, blended with a soft prior when you don't have much history yet) is documented, readable code, not a black box you have to trust on faith.

Your data is yours: export a doctor's report or your complete raw history anytime, turn on Anonymous Mode to hide your name and email throughout the app, and delete your account — instantly, completely — whenever you want.

Masik is free because it's ad-supported, not because your data is the product — we don't sell it, and we never will. That's the line: ads pay for this, your history doesn't.