Personal health tracking — private by design
Track every ingredient.
Find your triggers.
Own your data.
A single file that runs in your browser. No account. No subscription. No server ever receives what you log.
- ✓fodmap-tracker.html — runs in any browser, works offline
- ✓Setup guide (PDF) — desktop, iPhone, and Android
- ✓180+ ingredient database with FODMAP levels
- ✓Custom ingredient builder
- ✓Symptom logging and insights
- ✓Backup and restore — export an industry-standard backup file (JSON), import it on any device
- ✓iPhone and Android home screen install
- ✓No account. No subscription. No cloud.
See it in action
What the app looks like
Log a meal
Ingredient-level entry with FODMAP lookup
History
Full log with symptom and FODMAP flags
Insights
Trigger patterns and symptom trends
Desktop — History view with 31 days of sample data
Your data belongs on your device.
When you log symptoms, bowel patterns, and food triggers, that’s some of the most personal health data you generate.
Fieldnote stores everything in your browser’s local storage — on your device only. Not in the cloud. Not on our servers. Nowhere we, or anyone else, can access it.
This works the same whether you use the downloaded file or try the demo in your browser. Both store data locally. Neither sends anything anywhere. This is deliberate.
To move your data to a new device, you export a backup file and import it on the other side. You control what moves and when. That’s not a workaround — it’s the model.
Questions
FAQ
Can I try it before buying?
Yes. The demo at fieldnote.health/demo/fodmap is pre-loaded with 31 days of sample data — meals, ingredients, symptoms, insights — so you can see exactly what the app tracks and how it presents your data. You can also add up to 5 entries of your own to try the logging experience. The full version is unlimited.
Does my data stay private?
Completely. Everything is stored on your device only. Nothing is ever transmitted. This is true for the demo and the purchased file — both work identically.
Can I use it on multiple devices?
Yes. Export a backup file from one device, import it on the other. No automatic syncing — there's no server involved. You stay in control of where your data goes.
How do I install it on my phone?
Transfer the file to your phone, open in Safari or Chrome, tap Add to Home Screen. The included setup guide has step-by-step instructions for iPhone and Android.
What if I get a new phone?
Export your data before switching. Import it on the new device. Nothing lost.
What format is the backup file?
An industry-standard format (JSON) that any version of the app can read. Plain text — you can open it, read it, and keep it independently of Fieldnote.