Throughline: Symptom Tracker

Most symptom trackers ask three minutes a day and hand you a spreadsheet. Throughline asks ten seconds and hands you one page your doctor will actually read.

TEN SECONDS A DAY
One screen. Tap to log severity — no sliders, no typing, no forms. It saves as you go. A symptom diary you can finish on your worst day, because that is the day the data matters most.

THE APPOINTMENT BRIEF
Turn months of logs into a single page built for a ten-minute consultation: how many days you actually logged, what changed since your last visit, how often each symptom appeared and how bad it got, whether you took what you were prescribed, and the questions you wanted to ask. Export as a PDF and hand it over.

FLARE EPISODES
"How often do you get them, how long do they last, and are they getting worse?" is the question every specialist asks, and the one a daily diary is worst at answering. Throughline groups your bad days into episodes and reports how many, how long they typically run, and how far apart they start.

PATTERNS, WITH THE RECEIPTS
Throughline compares your symptoms against your medications and daily context — same day and the day after. Every finding shows how many days it rests on and both averages being compared. When there is not enough data to say something responsible, it says so instead of showing you a colour-coded grid.

NO STREAKS. NO GUILT.
There is no chain to break and no badge to lose. Missing days are part of being ill, not a failure of discipline. One optional daily reminder, at a time you choose — and it is free.

YOUR DATA STAYS YOURS
No account. No cloud. Everything lives on your device. Daily logging, editing any past entry, backing up, restoring and full CSV export are free forever — including if you cancel. Because on-device storage would otherwise mean losing your phone loses the record, the backup file restores everything. We will never lock your own medical record behind a subscription.

THROUGHLINE PRO
An optional subscription unlocking the Appointment Brief PDF, pattern analysis, flare episodes, unlimited tracking and full history beyond the last 30 days. Everything listed above stays free.

Useful for tracking migraine, ME/CFS and chronic fatigue, fibromyalgia, endometriosis, IBD and Crohn's, arthritis, long COVID, MS, POTS, and anything else that needs explaining to a doctor who has ten minutes. Log pain, fatigue, brain fog, nausea, sleep, mood and medication adherence day by day, then bring the summary to your appointment.

Throughline is a personal health record. It is not a medical device and does not diagnose, treat, or give medical advice. Always talk to a qualified clinician about your symptoms.