Log a Bristol type, a symptom, a meal, or a mood in well under thirty seconds. Gutlog keeps your data on your phone and surfaces the patterns that matter — without streaks, without guilt, without the quantified-self lecture.
Every card below is a real view inside the app. We built each one so the typical interaction is a single tap — and so the chrome disappears once you've done the thing.
A calm line of bars — Bristol type per day, with "type 4" highlighted as the sweet spot. No dashboards, no leaderboards.
A swipe carousel that picks for you, not at you.
Five gentle options, one tap, no face-chart.
Bristol, severity, food, stress, mood, notes. Everything above the fold on an iPhone mini.
After 14 days Gutlog starts whispering — "oats on Tuesdays, smoother Wednesdays." You decide what to do with it.
We're a small app with a specific audience: people with IBS, post-op recovery, FODMAP trials, or anyone who wants a private record that isn't trying to be their next addiction.
"Two weeks in, Gutlog told me dairy-heavy lunches were my Wednesday problem. It was right, and I got my afternoons back."
"I've tried MyFitnessPal, Bearable, Cara Care. This is the only one I actually open after a hard day. Because it doesn't ask anything of me."
"The watch complication is the sleeper hit. Log a Bristol before I even leave the bathroom. No phone, no app-open animation."
An honest side-by-side with the apps we hear about most. Anything green means the app does this by default, without a paid tier or a workaround.
Gutlog isn't diagnostic, and we're careful not to pretend otherwise. The signals the app surfaces are rooted in peer-reviewed GI research. A few pointers below.
Every correlation and alert Gutlog raises is conservative by design. If you've logged for fewer than 14 days, or the pattern is weaker than r = 0.3, the app won't show it — noise is worse than nothing.
◦ Not a medical device. Not a diagnosis. Talk to your GI.
Everything you log lives on your device via Apple SwiftData. You don't need an account to use Gutlog — not today, not ever.
Meal and symptom photos are encrypted on-device with AES-GCM before anything touches the cloud.
No IDFA, no third-party analytics, no follow-home. We can't track you across apps because we don't know how.
Nothing behind the free tier is time-boxed or guilt-ware. Plus is for people who want AI meal analysis and multi-month pattern detection.
$0/ forever
$29.99/ year
Skim these first — most people find what they need here. For anything else, support reads every message.
The short version: Gutlog works offline, doesn't need an account, costs $29.99/year for Plus, and exports your data as JSON any time you ask.
Thirty seconds, seven days a week. It adds up to a year of signal by next April.