Find out what your gut is reacting to.

GAS is a quiet daily log for meals, bloating, bowel movements, stress, sleep and water — and for the patterns between them that are hard to hold in your head.

Coming soon to iPhone and Android.

No ads, no analytics, no selling your data. Read the privacy policy

The GAS home screen, showing today's goals and the day's logged entries.

WHAT IT TRACKS

Six things, each logged in seconds

Every metric keeps its own colour across the whole app, so a week of logs reads at a glance.

Meals

Photograph it or type it. The app reads back the ingredients and calories, and you correct whatever it got wrong.

Bloating

How bad it is, from one to ten, with a note on what came before it.

Bowel movements

Bristol type one to seven, and whether there was pain or urgency.

Stress

One to ten, logged as often as it changes. It sits closer to your gut than most people expect.

Sleep

Hours a night, against a target you set yourself.

Water

A glass at a time through the day, against a daily goal.

HOW IT WORKS

Log it, then let the week explain itself

The history screen, with a month of logged days shaded on a calendar.

ONE · THE LOG

A month you can actually see

Every logged day shades in. Filter to one metric and the calendar shades by that metric's own scale, so a rough stretch shows up before you have read a single number.

TWO · TRENDS

One metric, one week, in its own terms

Bloating reads as severity, water as intake against your goal, bowel movements by Bristol type. A day you didn't log stays blank instead of quietly counting as a zero.

The insights screen, naming dairy as the trigger seen before the worst bloating days.

THREE · INSIGHTS

What tends to come before a bad day

Once there is enough logged, the app names what keeps showing up before your worst days. When there isn't enough to say anything yet, it says that instead of inventing a finding.

PRIVACY

A symptom diary is personal. This one is treated that way.

No ads, no analytics

Nothing you do in the app is measured for anyone else, and nothing is sold.

Yours to delete

Delete your account from inside the app, and your logs and photos go with it.

Meal photos, explained

A photo you log is read by Google Gemini so the app can name the ingredients back to you.

Named in full

The policy lists every service that touches your data, and what each one holds.

Read the privacy policy