A record of how you’re actually doing.
A perimenopause and HRT tracker for iPhone and Apple Watch. It reads what your Watch already records, keeps a log of your symptoms and treatments, and makes a one-page report your provider can read in thirty seconds.
Celsia is a perimenopause and HRT tracker. With your permission it reads your nights from Apple Health (sleep, heart rate variability, resting and overnight heart rate, and wrist temperature) and compares each one with your own usual range, never with anyone else’s.
Symptoms take one tap, from the app, the Lock Screen, Control Center, Siri or your Apple Watch. Every form of therapy has a place, with reminders that understand twice-weekly patches and cyclical progesterone. When a dose changes, Celsia shows what changed after it.
No account, no analytics, no ads. Apple Health data never leaves this iPhone. Nothing is sent to us. Celsia keeps a record and describes patterns in it; it doesn’t diagnose, and it doesn’t recommend treatments or doses.
Take the full tour at celsia.app.
Measured against your usual, not anyone else’s.
Each morning, Today sums up last night in a sentence and marks anything outside your own range: sleep, heart rate variability, resting and overnight heart rate, and wrist temperature. It’s read from what your Apple Watch already records, so there’s nothing to enter. On iOS 27, Celsia reads the stage you set in Apple Health, and symptoms you log there count too.
Log it and go back to sleep.
Night sweats, a hot flash, brain fog or any of more than twenty symptoms, in one tap; hold one to set how strong it was and when. Log from the Lock Screen, Control Center, Siri or your Apple Watch without opening the app. The symptoms and bleeding you log also go to Apple Health wherever it has a matching type, and what you’ve already logged in Apple Health counts too.
If you still have periods, log bleeding and spotting and see the days since your last bleed, with no predictions.
Patches, gels, pills, rings and the rest.
Estrogen patches, gels, sprays and tablets, progesterone, vaginal estrogen, rings, IUDs, testosterone, non-hormonal treatments, or your own entries. Reminders understand twice-weekly patches and cyclical progesterone, suggest the next patch site, and arrive as time-sensitive notifications with Taken, Snooze and Skip. Your next dose can also wait on the Lock Screen. Every dose change is marked on your timeline.
What changed when the dose did.
Change a dose and Celsia sets the four weeks before it beside the four weeks after: hot flashes, night sweats, sleep and wake-ups. The numbers come from your own record, with a note on why you’re seeing them. Your latest dose change is always there; every earlier one is part of Celsia Pro (in-app purchase).
One page your provider can read in thirty seconds.
One tap makes a PDF on your iPhone: your current therapy and how often you took it, symptoms per week, your nights against your usual, what changed after your latest dose change, bleeding, and the questions you want to ask. Share it, print it or save it. With Celsia Pro (in-app purchase), it adds pages with every symptom, dose and note. Add the date of your next appointment and Celsia can remind you the evening before.
Four weeks, against your usual.
Trends show the last four weeks of your nights and symptoms against your usual range, and what changed after your latest dose change. With Celsia Pro (in-app purchase): twelve weeks to a year, every earlier dose change, and pattern cards that show when symptoms line up with your nights, your cycle or your therapy, each with its numbers and a “Why am I seeing this?” note.
One tap from your wrist.
Celsia’s Apple Watch app puts hot flashes and night sweats one tap away, with today’s count and an Undo, and shows your next dose with a Taken button and how many doses you logged in the last seven days. What you log on the Watch comes back to your iPhone.
No account. Nothing sent to us.
There’s no sign-in, no analytics, no ads, no tracking and no third-party SDKs. Apple Health data never leaves this iPhone. Nothing is sent to us. Export what you’ve entered, or delete everything, at any time.
Logging, the therapy log, reminders, widgets, the Apple Watch app, the one-page report, what changed after your latest dose change, and exporting everything you’ve entered are free and stay free.
The full report with a day-by-day grid, unlimited report history, trends past four weeks, every earlier dose change, pattern cards, and your choice of device for sleep and heart rate variability.
Apple Health data never leaves this iPhone.
