Meet FODMAP Detective — Win the FODMAP reintroduction phase

Health And Fitness

FODMAP Detective

Win the FODMAP reintroduction phase.

Every feature, from the first launch.

No account, no login, no cloud. Everything runs on your device and works fully offline — nothing in this post is hidden behind a wall.

What FODMAP Detective does

FODMAP Detective is the offline guide through the hardest part of the low-FODMAP diet: the reintroduction phase, where most people get stuck and never learn which foods they can actually tolerate.

The low-FODMAP diet is the first-line dietary treatment for IBS, which affects 25-45 million Americans. But the gold-standard food-rating app (Monash) has no symptom tracker, and the comprehensive logger (mySymptoms) produces analysis reports users call 'completely useless.' Nobody owns the guided-reintroduction-plus-readable-results niche.

What FODMAP Detective does:

— Guided challenges, one FODMAP group at a time. Fructose, lactose, sorbitol, mannitol, GOS, fructans — the app walks you through a structured challenge for each, with the right test foods and portions, and schedules the challenge and washout windows. — Symptom logging that fits IBS. Bloating, pain, urgency, stool (Bristol scale), gas — logged in seconds, time-stamped. — Per-group tolerance verdicts. After a challenge, FODMAP Detective gives a plain-English result: 'You tolerated lactose well' or 'Fructans triggered moderate symptoms at half a serving.' The correlation report Monash and mySymptoms never deliver. — Bundled FODMAP food list. Foods tagged by FODMAP group and serving threshold, on-device — no recipe or barcode API. — Challenge reminders. EventKit nudges for the next test dose and the washout day. — Doctor/dietitian PDF. Export your full reintroduction results. — No account, no ads, no subscription, no cloud.

For the 25-45M Americans with IBS whose dietitian told them to do reintroduction — and who need a detective, not a spreadsheet.

A look inside

Tap any screenshot to open the full-resolution version.

What's inside

Challenges — Guided single-FODMAP-group reintroduction with scheduled doses
Log symptoms — Bloating/pain/urgency/Bristol-scale stool/gas, time-stamped
Verdicts — Plain-English per-group tolerance result
Food list — Bundled foods tagged by FODMAP group + threshold
Dietitian PDF — Full reintroduction results export via share sheet

Why we built it

The low-FODMAP reintroduction phase is where people get stuck, but Monash (gold-standard ratings) has no symptom tracker and mySymptoms produces analysis reports users call 'completely useless' — nobody guides the per-group challenge and delivers a readable tolerance verdict.

What makes it different

FODMAP Detective is the only app that guides structured single-FODMAP-group reintroduction challenges (scheduling test doses + washouts via EventKit) and outputs a plain-English per-group tolerance verdict from your symptom log — entirely offline with a bundled FODMAP food list — Monash has no symptom tracker, mySympt…

Who it's for

Anyone who wants honest tracking without a coach, a subscription, or a streak guilting them at 11pm.

In one line: Win the FODMAP reintroduction phase.

Try it

See the FODMAP Detective app page for the full feature list, the info table, and support links.

Use FODMAP Detective, found a bug, or have a feature request? Comments are open below — anonymous is fine.