HerMetrics reads your cycle, your fuel and your training together, and tells you what today is for — push, steady or go lighter — and how to eat for it.
For iPhone. Android later.
The apps that followed track one thing each: a period calendar here, a calorie counter there, a workout log somewhere else — and none of them talks to the others. But a cycle isn't a side detail. Across a month it moves your energy, your recovery, your core temperature and your appetite, and a plan that ignores it is a plan written for someone who doesn't have one.
The honest part: the evidence for training by cycle phase is real but modest. So HerMetrics starts from the population pattern — a 28-day cycle, a lighter stretch before your period — says so plainly, and prefers your own logged pattern the moment it has one. After a handful of morning energy ratings, the plan reads you, not the average.
Each one is worth logging on its own. The point is what they say together.
Where you are, and what that tends to mean. Log a period in one tap; the ring places you by phase and the calendar shows the month. Rate your energy once a day and, after six ratings, training reads your own pattern. Irregular cycles, hormonal contraception and pregnancy are each handled as what they are, not ignored.
A target built in layers you can open: resting metabolism from the women's equation, your day, your cycle phase, today's training, your goal. Portions in slices and cups, not grams. Scan a barcode or search; iron, calcium and the rest are tracked because training and menstruating both ask for them.
One verdict each morning — push, steady or go lighter — with the reason. Log a session in a few taps or have one built for the day, your equipment and your week. Apple Health workouts come in; what you log here goes back out.
Say it's day 25. Two hard sessions this week, yesterday under-fuelled, energy rated 2 this morning. Every engine reads all of it.
Fuel adds the luteal allowance and will not plan a deficit today. Train builds a mobility session instead of intervals. The coach's note reads all four lines and writes one paragraph you can act on:
“Energy at 2 and a hard session two days ago: today is for easing off, not pushing through. Eat to the target — it's a little higher this week on purpose.”
Log a period, rate your energy, miss a meal, and tomorrow's plan moves. Every number on screen comes from an engine; the coach writes around them and can't change them.
An app that advises active women on calories is talking to the group most at risk of under-fuelling. So the limits are enforced by the engines, in code that is tested on every change — never by a sentence a model could be argued out of.
Push when your body is ready for it, ease off when it isn't — and know which is which before you've warmed up.
A target that rises with your training and your luteal phase, and refuses to drop below what you need.
Open any number and see how it was built. Go back and fill in a missed meal, and the plan updates.
A daily note written from your own numbers, with a follow-up a tap away — and a nudge to see a doctor when something warrants it.
No. HerMetrics gives guidance built from your own numbers, and tells you when something is worth a doctor — periods that stop, for one. It never diagnoses, and it's not a substitute for care.
No. A watch adds imported workouts and resting heart rate. Everything else works from what you log, and logging is designed to take seconds — one tap for energy, a barcode for food, a repeat for the breakfast you always have.
Each is handled as what it is. Irregular cycles: predictions are marked approximate and your own ratings matter more. Hormonal contraception that suppresses a cycle: the phase layer switches off rather than inventing one. Pregnancy: the rules invert, and training cautions change with the trimester.
On your phone first, synced to our server so a new phone can restore it. The sensitive parts — cycle, symptoms, pregnancy — are sealed before they leave the phone with a key only you hold. The privacy policy lists exactly what goes where.
iPhone first. Android later.
Log a period, rate your energy, eat something. Tomorrow's plan already knows.