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Free on iPhone · iOS 17 or later

Understand what upsets your gut.

SII: IBS & FODMAP Tracker brings together your journal, a sourced FODMAP database and a summary for your doctor. Designed for irritable bowel syndrome, it keeps your journal on your iPhone.

Download on the App Store Frequently asked questions

98 foods, each with its own drawing

The journal

Your day, moment by moment.

Meal, symptom, stool, night, water, activity, mood or medication: everything is logged in the same place, in a few seconds. Right away, or after the fact.

  • Meal
  • Symptom
  • Stool
  • Night
  • Water
  • Activity
  • Mood
  • Medication
The Today screen: the night, meals, a stool, a walk and bloating logged about 2 h 30 min after breakfast.

“When?”, for after the fact

Pick the day and time it happened, even several days later.

The Bristol scale

A stool is logged by its type, from 1 to 7.

The link with your meals

Under a symptom, the app shows the meal before it: “about 2 h 30 min after the 7:46 AM meal”.

Quick log

From your Home Screen, a widget starts a meal, a stool or a symptom in one tap, and counts a glass of water.

Foods

Spot the foods high in FODMAPs.

98 foods, each with its level and its source. When something is not established, the app tells you instead of guessing.

  • OnionHigh
  • AppleHigh
  • AvocadoModerate
  • BroccoliModerate
  • CarrotLow
  • StrawberryLow
The Foods tab filtered on high level and vegetables: onion, garlic, shallot, asparagus, artichoke, cauliflower.

Low, moderate, high

Filter foods by level and by group: fruit, vegetables, grains, dairy, protein.

A source for every level

Each food says why it is one to watch, “Rich in fructans” or “Rich in polyols”, and where its level comes from.

The product scanner

Scan a barcode: with Open Food Facts, the app spots additives and ingredients known to trigger symptoms, such as polyols.

Meals and shopping

Low-FODMAP meal ideas, and a shopping list you can check off from your Home Screen.

Summary

What comes up before your symptoms.

Your week in three numbers, then the foods that come up more often in the 14 hours before a symptom than in your other meals.

The Summary tab: four days with a symptom out of seven, and onion in “What comes up before”, followed by a symptom 17 times out of 18.

A lead, not a verdict

The summary counts meals; it does not name a cause. Check it with your doctor or dietitian, through a reintroduction.

Guided reintroduction

Test the FODMAP groups one at a time with a guided protocol, and note your tolerance.

A report for your doctor

A PDF of the period you choose, to show at your appointment.

Reminders at your time

Water, medications, evening check-in, Sunday summary, the day before an appointment.

Your privacy

Your journal stays on your iPhone.

No account, no sign-up, no ads, no trackers. The only thing the app sends out is the barcode you scan, to look it up in Open Food Facts.

The SII lock screen: a padlock, “Your journal is locked”, and the Unlock with Face ID button.

Face ID, Touch ID or passcode

With the lock on, your journal no longer shows in the app switcher, and the app locks again after one minute in the background.

Discreet widgets

When the app is locked, they show nothing from your journal.

Backups, if you want

Your journal goes into iPhone backups only if you turn it on, in My space → My data.

It's all written down

What stays on your iPhone and what leaves it is detailed in the privacy policy.

FAQ

What people ask us.

Another question? Write to us from the support page.

Which app can I use to track irritable bowel syndrome?

SII: IBS & FODMAP Tracker is a free iPhone app designed for irritable bowel syndrome (IBS) and low-FODMAP diets. You log your meals, symptoms and stools, look up 98 foods with sourced FODMAP levels, and the summary shows what comes up before your symptoms.

Is the app free?

Yes. SII is free, with no ads and no account to create.

Does my health data leave my iPhone?

No. Your journal is stored on your iPhone and sent to no server. The only thing the app sends out is the barcode of a product you scan, to look it up in Open Food Facts. Your journal goes into iPhone backups only if you turn it on.

How do I know if a food is high in FODMAPs?

The Foods tab gives the level of 98 foods (low, moderate or high), each with the source that supports it. When no source establishes a level, the app says so instead of guessing. The scanner also flags, in a packaged product, additives known to trigger symptoms, such as polyols.

Can I log a meal or a symptom after the fact?

Yes. Every entry has a “When?” line: you pick the day and time it happened, even several days later.

How does the app spot what triggers my symptoms?

For each food, the summary counts how many of its meals were followed by a symptom within 14 hours, and compares that with your other meals. A food that clearly stands out appears in “What comes up before”. It is an indicator, not proof: check it with your doctor or dietitian, for example through a reintroduction.

Does the app replace a doctor?

No. SII is a tracking and information tool: it does not provide a diagnosis and does not replace the advice of a healthcare professional. The PDF report helps you prepare for an appointment. If your symptoms worry you, see a doctor.

Which devices does SII work on?

iPhone, with iOS 17 or later. The app shows in English or French, depending on your iPhone's language.

Important

SII is a tracking and information tool. It does not provide a diagnosis and does not replace the advice of a healthcare professional. If your symptoms worry you, see a doctor.

Start your journal today.

Free, no account, in English and French. You need an iPhone with iOS 17 or later.

Download on the App Store