Daily logging
Record flow (spotting, light, medium or heavy) plus discharge, symptoms, moods and a private note.
Lull
A calm, private period tracker for iPhone. Your cycle stays yours.
Coming soon to the App Store
What Lull does
Everything you need to understand your cycle, and nothing you didn't ask for.
Today at a glance
Your current cycle day, days until your predicted period, how confident that prediction is, and a fertile-window estimate.
Calendar
A month grid showing every logged day alongside your predicted period, PMS window and fertile window.
Insights
Cycle history, averages and regularity, symptom and mood patterns by cycle phase, and a recap of your last cycle.
Widgets & gentle nudges
Home-screen and lock-screen widgets for your cycle status and a “Logged today?” habit nudge, plus an optional daily reminder that skips days you've already logged.
Apple Health, if you want it
Off by default. Turn it on to mirror flow, discharge, symptoms, moods and cycle status into Cycle Tracking and State of Mind, and to see cycle-deviation and wrist-temperature cards.
Your cycle data never reaches us
Most period trackers are built around a server. Lull isn't. There is nowhere for us to store your data, because we never receive it in the first place.
- No developer servers
- No accounts or sign-ups
- No analytics or tracking
- No ads
- No third-party SDKs
- Nothing sold or shared, ever
Your entries live on your iPhone and sync, if you want them to, only through your own private iCloud database, which we cannot access. Apple Health integration is opt-in and permission-gated. Read the full privacy policy.
Coming soon
Lull isn't on the App Store yet, but it's on its way. In the meantime you can read how the app handles your data, or browse the answers to common questions on the support page.