Will A Gut Day diagnose IBS-D?

No. Diagnosis belongs to your doctor. A Gut Day helps once you have a diagnosis - or while you're still figuring out what's going on - by giving you data to discuss.

Does the app know which foods are high-FODMAP?

Yes. Common high-FODMAP foods are tagged automatically when you log them, and you can switch on a 'low-FODMAP only' filter.

I get urgency from coffee but I love coffee. Can the app help me find a tolerated dose?

Yes. Log every cup with size, brewing method and time. After 2-3 weeks you'll see the dose-response curve - often there's a personal cut-off.

Is IBS-D the same as chronic diarrhoea?

No. Chronic diarrhoea has many causes (infections, IBD, bile-acid malabsorption, coeliac). If urgency is severe or you see blood, see a doctor before tracking.

Does stress alone trigger IBS-D, or only food?

Both, often together. Many users find that 'stressful week + a normally-fine food' equals a flare, while either alone wouldn't. The app catches these combinations.

For IBS-D (diarrhoea-predominant)

Find what triggers your urgency - in two weeks, not two years.

IBS-D feels like the bathroom owns your calendar. A Gut Day helps you connect what you ate, drank and felt to those urgent moments - so you can plan around them.

Start tracking - free See features

What makes IBS-D different

IBS-D is dominated by loose stools, urgency and frequent bowel movements - often within an hour of eating. Common triggers include caffeine, alcohol, fatty meals, large portions, fructose, sorbitol and acute stress. Generic advice helps a little. YOUR personal triggers help a lot - and they're usually a small list of 3-7 specific foods or moments. A Gut Day finds them.

What you'll be able to see after two weeks

Your top urgency triggers

Ranked list of meals and drinks most often followed by Bristol 6-7 within 4 hours.

Your safe-zone meals

Meals that have NEVER preceded a flare - your go-to list for restaurant days.

Stress correlation

Whether your bad days cluster on stressful weeks or are purely food-driven.

How A Gut Day helps

Built for this exact problem

Bristol 6-7 alerts

Log a watery stool with one tap. The app cross-checks meals from the last 4-24 hours.

Bristol scale 1-7
Urgency rating
Time-to-bathroom tracking

Caffeine & alcohol log

Quick-add coffee, tea, beer or wine - with portion size and time.

Quick-add favourites
Portion sliders
Cumulative day total

FODMAP phase support

Tag meals as elimination, reintroduction or personalisation. Insights respect the phase.

FODMAP tagging
Reintroduction tracker
Per-FODMAP-group filtering

Travel & restaurant mode

Snap photos when you can't read ingredients. AI fills in what it can later.

Photo-only entries
Backfill ingredients later
Time-zone aware

How it works for IBS-D

1
Log every meal, drink and bathroom visit
Even the small ones. The first week is just data collection.
2
Rate urgency 1-5
How fast did you need to go? This is the key signal for IBS-D pattern detection.
3
Let the AI rank suspects
After ~14 days, you'll see the foods most often followed by urgency.
4
Try eliminating one at a time
Remove the top suspect for 2 weeks. Reintroduce. Confirm or move to the next.

Why caffeine and fat hit IBS-D the hardest

Coffee stimulates colonic motility within 4 minutes - useful for most people, brutal for an already-fast IBS-D gut. The threshold varies wildly: some people tolerate one espresso, others react to a single cup of green tea.

Fat is the second big lever. The gastrocolic reflex (the urge to go right after eating) is amplified by fatty meals. A 30g-fat meal can trigger urgency where a 15g meal wouldn't. Tracking actual portion sizes - not just 'I had pasta' - is what makes the pattern visible.

Stress and IBS-D: not in your head, in your gut

The gut-brain axis is real and bidirectional. Cortisol speeds up small-intestinal transit and changes microbiome composition within hours. For IBS-D, this often means a stressful Tuesday becomes a urgent-bathroom Wednesday.

A Gut Day's stress slider (1-5) plus sleep tracking lets the insights engine separate food triggers from lifestyle triggers - so you don't blame the salad when the real culprit was the deadline.

Frequently asked questions

Will A Gut Day diagnose IBS-D?: No. Diagnosis belongs to your doctor. A Gut Day helps once you have a diagnosis - or while you're still figuring out what's going on - by giving you data to discuss.
Does the app know which foods are high-FODMAP?: Yes. Common high-FODMAP foods are tagged automatically when you log them, and you can switch on a 'low-FODMAP only' filter.
I get urgency from coffee but I love coffee. Can the app help me find a tolerated dose?: Yes. Log every cup with size, brewing method and time. After 2-3 weeks you'll see the dose-response curve - often there's a personal cut-off.
Is IBS-D the same as chronic diarrhoea?: No. Chronic diarrhoea has many causes (infections, IBD, bile-acid malabsorption, coeliac). If urgency is severe or you see blood, see a doctor before tracking.
Does stress alone trigger IBS-D, or only food?: Both, often together. Many users find that 'stressful week + a normally-fine food' equals a flare, while either alone wouldn't. The app catches these combinations.

IBS overview

The full IBS guide.

Low-FODMAP

Phase tracking for the low-FODMAP diet.

Intolerances

Lactose, fructose, sorbitol and more.

Two weeks. Real patterns. Less urgency.

Free to start. No credit card. Designed for sensitive bellies.

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