Gratis Partner App
The app that brings your fertility data to life.
The DaysyDay app is your mobile companion to the Daysy Fertility Tracker — view your fertility status, ovulation, menstruation, cycle calendar, temperature curve and personal notes in one calm interface. Languages: English, German, France, Italian, Portugees, Spanish.
App features
Everything that matters about your cycle.
The DaysyDay app turns your daily measurements into clear, beautiful insights — so you can see exactly where you are in your cycle.
Fertility status overview
Ovulation overview
Menstruation tracking
Calendar view
Temperature curve
Notes & statistics
Sync on your terms
Your data lives on Daysy. Sync whenever you choose.
Stored on Daysy
Every measurement is saved securely on your Daysy device.
Sync when you want
Connect to the app whenever it suits you — there's no rush.
No daily syncing required
Daily syncing isn't necessary. Your cycle data waits for you.
Privacy by design
Your data stays yours.
Your personal cycle data is protected at every step. Outside parties don't have automatic access — you stay in full control of what's shared, with whom, and when.
- Personal data stays protected
- No automatic third-party access
- You're always in control
Gratis Partner App
Bring your partner along — only if you want to.
The DaysyDay Partner app is an optional companion that lets your partner stay informed and supportive — strictly with what you choose to share.
Explore the partner appReady to bring your cycle to life?
The DaysyDay app comes free with every Daysy Fertility Tracker.