Symtrail
🤒
Symptoms in seconds
Pick from a ready-made list — fever, sore throat, mouth ulcers, stomachache — or add your own. Rate it from mild to severe and you're done.
Keep track of every symptom, fever and dosefor everyone you care for
Symtrail is a calm, private health diary for families. Log a symptom in seconds, see patterns emerge over weeks, and walk into your next appointment with a clear report instead of a fuzzy memory.
Free to download. No account, no ads, no data selling.
Works offline
One diary per person
20 languages
Light & dark
What it does
Everything you'd otherwise scribble on the back of an envelope
Built by a parent who got tired of reconstructing three weeks of fevers from memory in a five-minute appointment.
🌡️
Temperature log
Every reading with its exact time, charted so you can see a fever climb and break. Celsius or Fahrenheit, your choice.
💊
Doses & reminders
Record what you gave, how much and when — then set a reminder for the next dose so nobody has to do mental arithmetic at 2am.
👨👩👧
One diary per person
A separate history for each child, for a parent you care for, and for yourself. Switch between them in a tap.
📅
Calendar & search
Scan the month at a glance, or filter the whole history by symptom, severity, type and date range to answer "when did this last happen?"
📄
Report for the doctor
Export a tidy PDF summary of flares, temperatures and medications — share it before the appointment or hand over your phone during it.
Patterns, not guesswork
See the rhythm behind recurring fevers
Some fevers come back on a schedule. Symtrail groups related days into a single flare, measures the gap between them and shows you the window when the next one is likely — so you can plan around it instead of being ambushed.
- Automatic flare grouping from your temperature and symptom logs
- Average, shortest and longest gap between flares
- A predicted window for the next onset, updated with every entry
- Purpose-built for PFAPA — mark a profile and cycle tracking turns on
Flare
Predicted window
Avg every 28 days
Appointments
Turn months of notes into one page
Doctors get minutes, not hours. Symtrail's export gives them the cycle summary, every flare with its dates, peak temperature and length, a 90-day temperature chart, and the full entry list underneath.
- Clean PDF, generated on your phone
- Share by email, message or AirDrop — or just show the screen
- Nothing is uploaded to make it
Privacy
Health data belongs on your phone
Symtrail is built so that the sensitive part of your diary never leaves your device.
🔒
Stored on your device
Symptoms, temperatures, medications and notes are saved locally. They aren't uploaded to a server.
🙈
No account required
No email, no password, no profile to create. Install it and start logging.
📵
No ads, no data selling
We use anonymous usage counts to see which screens get used — never symptom names, temperatures or notes.
Questions
Frequently asked
Is my health data private?
Yes. Everything you log stays on your phone. Symtrail doesn't require an account, and symptom names, temperatures and notes are never uploaded.
Can I track more than one person?
Yes. Symtrail is built around profiles, so you can keep a separate diary for each child, for a partner or parent you care for, and for yourself. Switching between people takes one tap.
Does it work offline?
Yes. Logging works with no signal at all — in a waiting room, on a plane, or at 3am in a hospital corridor.
Does Symtrail help with PFAPA?
Yes. Mark a profile as a PFAPA patient and Symtrail groups fevers into flares, works out the average gap between them, and shows the window when the next flare is likely. It's just as useful for any recurring or hard-to-describe symptom pattern.
What languages does it support?
Twenty, including English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Czech, Romanian, Bulgarian, Greek, Swedish, Turkish, Ukrainian, Russian, Hindi, Japanese, Korean and Chinese. The app picks up your phone's language automatically, and dates follow it too.
How much does it cost?
Symtrail is free to download.
Is Symtrail a medical device?
No. It's a diary that helps you record and share what you observe. It doesn't diagnose anything and it isn't a substitute for medical advice.
Start your first entry today
Symtrail is launching on iOS and Android shortly.