Do I need to log every single meal?

No, but the more consistent you are, the sharper the patterns. Most users log 80% of meals after the first week.

Can I edit a meal after the fact?

Yes. Open the timeline, tap the meal and change anything - including time, ingredients or portion size.

Does it count calories?

Calories are optional. A Gut Day is built for digestive health, not weight loss - but you can switch on macros if you want them.

What about restaurant meals?

Use a photo or a voice note. The AI does its best, you can edit before saving.

The food diary, modernised

A food diary you'll actually keep using.

Paper diaries last a week. Excel sheets last three days. A Gut Day turns logging into a 10-second tap, photo or voice note - so you finally have the data your gut deserves.

Start your diary - free See the features

Why traditional food diaries fail

If your dietitian asked you to write down everything you eat, you know the drill: enthusiastic on Monday, lapsed by Wednesday, abandoned by Friday. The problem isn't motivation - it's friction. Typing every ingredient, decoding labels, remembering yesterday's lunch. A Gut Day removes the friction.

How A Gut Day helps

Built for this exact problem

Photo to ingredients

Snap your plate. AI lists what's on it - including hidden ingredients like onion or garlic.

Barcode scanner

Scan packaged food and instantly see ingredients, allergens and likely gut triggers.

Voice notes

Talk while you cook. We transcribe and tag the meal automatically.

Symptom tracking

Bloating, cramps, energy, mood - quick taps that build up into clear correlations.

Smart insights

After two weeks, the app surfaces your personal triggers ranked by likelihood.

Share with your professional

Export a clean PDF or CSV for your GP, dietitian or gastro-enterologist.

How it works

1
Open the app
Hit the big '+' button - it's the only button you really need.
2
Choose your input
Photo, barcode, voice or quick tap on a recent meal.
3
Log how you feel
Optional but powerful. The more you log, the better the patterns.
4
Read your insights
Open Insights weekly to see what your gut likes and what it doesn't.

Frequently asked questions

Do I need to log every single meal?: No, but the more consistent you are, the sharper the patterns. Most users log 80% of meals after the first week.
Can I edit a meal after the fact?: Yes. Open the timeline, tap the meal and change anything - including time, ingredients or portion size.
Does it count calories?: Calories are optional. A Gut Day is built for digestive health, not weight loss - but you can switch on macros if you want them.
What about restaurant meals?: Use a photo or a voice note. The AI does its best, you can edit before saving.

Your gut, finally written down.

Free to start, no credit card. Quit when you want - your data stays yours.

Start my free diary