Cycle-aware weight tracking
Tideline reads your daily weigh-in against your menstrual cycle — comparing today to the same day last cycle, not just yesterday — so normal luteal-phase water never gets read as failure.
iOS · Free to start · No account required
Tracking below last cycle — quiet, steady progress.
What Tideline does
Day 23 of this cycle against day 23 of the last one. That's the honest comparison — and it changes how the number feels.
A calm ring shows exactly where you are — menstrual, follicular, ovulatory, or luteal — and how many days until your next period.
This cycle and last cycle plotted on the same axis, lined up by cycle day. Watch the real trend emerge from the daily noise.
Weight plus optional hunger, energy, soreness, and workout check-ins. One tap on the big + and you're done for the day.
Each phase comes with what to expect this week — appetite, energy, training — so nothing on the scale surprises you.
Instead of a raw number, Tideline tells you what it means: "the scale's up today, but you're down vs last cycle — trust that number."
Everything lives on your phone. Export it as a CSV or erase it entirely, any time, from Settings.
How it works
Log your weight in seconds. Add how you're feeling if you want — it's always optional.
That's all Tideline needs to place every weigh-in on your cycle and learn your personal rhythm.
Tideline lines this cycle up against the last one and shows you steady progress instead of daily noise.
No account. No server. No analytics, ads, or tracking. Weigh-ins and cycle dates live in a private database inside the app — and nowhere else. Cycle data is sensitive; it is never shared or sold, in any form, ever.
Read the full privacy policy →