A private cycle calendar
A period, ovulation and pregnancy calendar. No ads. The key to your entries stays on your phone — not even we can read them.
Most trackers ask you to hand over the most intimate details of your life, and stay quiet about where that goes next. Kvit is built the other way around: your entries are encrypted on the phone itself — the key lives in the system’s secure storage and is never sent anywhere. They travel to your cloud copy encrypted the same way, so not even we can read them.
An honest forecast
A typical tracker draws one confident date always — even when there is nothing yet to compute it from. Kvit labels where the forecast came from instead, and when it cannot compute one reliably it says so.
Kvit
in 12 days
For now, from your settings
For now the forecast is based on the cycle length in your settings, not on recorded cycles.
A typical tracker
12 September
The same confident date in all three situations.
A diagram, not a screenshot. The numbers are illustrative — we make no claim about forecast accuracy.
Cycle, pregnancy and the time after birth — one app, not three separate stories.
A calendar that shows where you are now and what comes next. A forecast for your next period with an honest confidence level instead of false precision.
Your current week and every past week are always free. How your baby is changing and what is happening to you.
Kvit stays with you after birth — the same app, not a separate story.
Articles on cycles, pregnancy and recovery, with named sources and a medical disclaimer. We explain, we do not frighten.
Not “we promise not to read it”, but “we do not have the key”. Here is exactly how it is built, so you do not have to take our word for it.
Your phone
Mood: calm. Cramps low down.
Key
Our server
49QZD JEZ9Y HEJ/+Z /+7 7U+XR
No key
An entry is encrypted before anything goes near the network. Ciphertext travels to the server; the key is not visible from there — which is why we cannot read the entry either.
AES-256. The key sits in the Keychain on iOS and the Keystore on Android, and never leaves the device.
AES-256. The key is held in the system’s secure storage — Keychain on iOS, Keystore on Android — and never leaves the device.
Entries are encrypted on the phone with a key that never leaves it, and only then uploaded. The server receives ciphertext, a record id and a change timestamp.
Carry their own additional encryption on top of the database — and that is the form in which they travel to the cloud copy.
Turn it on and the app will not open even on an unlocked phone.
There are no advertising libraries in Kvit, we do not collect advertising identifiers, and your entries are not sold or passed to ad networks.
Any time, no questions. The privacy policy describes the app as it is today — including the parts that are inconvenient for us.
Real screens from the app — light and dark themes.
Home: where you are in your cycle
Calendar with every phase
Diary: symptoms, mood, notes
No tricks — here is the exact split.
Everything the app is for, day to day.
A subscription for going deeper.
The cloud copy is free: privacy should not be a paid feature. There are no ads in Kvit.
Cycle, calendar and forecasts are free. No ads, and your entries are never sold.
