Baseline app icon

Tracking that survives a bad week

A symptom tracker for chronic and invisible illness. One sentence a day, said or typed.

Download Baseline on the App Store iPhone and iPad · one payment, no subscription

Most symptom trackers ask more than a bad day can give

Checklists, sliders, twenty questions before breakfast. On the days worth recording, that is exactly when logging stops. Then the gap in the data lands in the appointment where you needed it most.

Baseline asks for one sentence, in your own words. Say it or type it, and it becomes structured entries you can correct with one tap.

“woke up wrecked, headache about a 6, barely slept” Becomes: fatigue 8, headache 6, poor sleep 7. Correct any number with one tap.

Miss a day, a week, a month. Nothing breaks. There are no streaks here, and nothing to keep up.

What it looks like

Logging a day in one sentence, by voice or by typing A finding with the number of days, the strength of the pattern and its q value Months of symptom history in one grid Exporting the history by symptom or by day for an appointment Apple Health data filling in sleep, steps and heart rate automatically

What you get

Log without opening the app

Answer the evening reminder straight from the Lock Screen. Or use a widget, Control Center, or ask Siri. Whichever costs you the least that day.

Findings you can check

Every pattern shows its evidence: how many days it rests on, how strong it is, and how likely it is to be a fluke. Nothing is reported below twenty days of overlap, and results are corrected for false discoveries.

It notices the delay

Symptoms compare against your Health data at delays of nought to three days, so a crash two days after an active one shows up as what it is.

Apple Health, both ways

Sleep, steps, heart rate, HRV and cycle data come across on their own. What you log is written back, so your other apps can see it.

Ready for the appointment

Export by symptom or by day, over any range. Or generate a plain summary of what you logged and what the statistics found, and take it with you.

Bring your history with you

Baseline reads a Bearable export directly, symptoms, sleep and activity included, so switching does not cost you the months you already logged.

Built for hard days

Dark by default, because light sensitivity is a symptom. Large legible type, full VoiceOver support, and every animation respects Reduce Motion.

Private by construction

Entries sync through your own iCloud account. There is no Baseline account and no server of ours holding your health record.

Buy it once

Logging, history, Apple Health and iCloud backup are free forever. One payment unlocks Findings, full export and the appointment summary, on every device you own. Nothing to cancel.

Download Baseline on the App Store