Honest estimates
Your next period, as a range
Tidepup shows a range of days, never a single promise. Every prediction is labeled estimate, and the phase band shows where you are in your cycle.

Luteal phase
Day 24 of an estimated 29-day cycle
You are here
PeriodFollicularFertile, est.Luteal
Next period, estimate
Nov 12 to 15
in 4 to 7 days

Luteal phase
Day 24 of an estimated 29-day cycle
You are here
PeriodFollicularFertile, est.Luteal
Next period, estimate
Nov 12 to 15
in 4 to 7 days
Flow
Spotting
Light
Medium
Heavy
Mood
Calm
Happy
Tired
Irritable
Anxious
Sad
Symptoms
Cramps
Bloating
Headache
Tender breasts
Acne
Cravings
Back pain
Flow
Spotting
Light
Medium
Heavy
Mood
Calm
Happy
Tired
Irritable
Anxious
Sad
Symptoms
Cramps
Bloating
Headache
Tender breasts
Acne
Cravings
Back pain
Log in seconds
One hand, one tap, done
Flow, mood and symptoms are single taps. Add a note or a temperature when you want to. Most days take under 10 seconds.
Private by design
Stays on this iPhone
Nothing is sent anywhere. There is no account to create and no server that holds your cycle.

On this iPhone only
Face ID lock
Discreet widget
Export your own backup
No account
Widgets with Mo
Mo on your home screen
See the estimate at a glance. A discreet version shows only the days and a colored dot, with no wording.

Tidepup Pro, pay once
PDF summary
Cycle and symptom charts
BBT chart
Custom tags
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