Bristol Stool Chart App: Find Your Type With a Scan

A Bristol stool chart app identifies where your stool falls on the seven-type Bristol scale automatically, from a quick photo — no squinting at a laminated chart and debating whether you’re looking at a Type 3 or a Type 4. Stoolio does this with every scan: point your phone at the bowl, and the readout includes your Bristol type on a 1–7 selector with a plain-language description of what the scan saw.

What is the Bristol stool chart?

The Bristol scale is the standard way clinicians describe stool consistency. It runs from Type 1 (separate hard lumps) through the middle types to Type 7 (entirely liquid), and it exists because “consistency” is otherwise hopelessly subjective — one person’s “kind of loose” is another’s “normal.” Seven numbered types give everyone the same vocabulary. That’s also why it’s the single most information-dense field in any stool diary: consistency responds to hydration, fiber, and how fast things moved through you, so one number carries a lot of signal.

Why use an app instead of the chart on the wall?

Self-classifying against a chart has two quiet problems. The first is consistency: humans drift. The type you’d assign depends on your mood, your memory of last time, and how long you’re willing to look — so a self-kept log wobbles in ways that have nothing to do with your gut. The second is that a mental note isn’t a record. Knowing you were “probably a 5 today” helps nobody in three weeks.

An app fixes both. The scan applies the same visual criteria to every photo, so a Type 4 today means the same thing as a Type 4 last month — and every classification is stamped, stored, and plotted without you writing anything down. The consistency point matters more than it sounds: for spotting change, a classifier that’s identical every time beats an expert who’s different every day. It’s the heart of why scanning is reliable for what it measures.

How Stoolio identifies your Bristol type

Computer vision reads the visual features that define the Bristol types — edges, texture, fragmentation — and maps what it sees onto the scale. Your result shows the full 1–7 selector with your type highlighted, plus a plain-language visual estimate like “soft blobs with clear-cut edges,” so the number never floats free of what it means. The same scan also reads a color assessment and feeds your hydration and fiber indicators, an estimated transit range, and your Stoolio Score — the Bristol type is one reading inside a full readout, not the whole show.

What your Bristol type feeds into

Consistency relates to how long food spent moving through you — firmer types generally read slower, looser types faster — which is why each Stoolio scan pairs your type with an estimated transit range (like 18–30 hours). Over weeks, your types settle into a personal pattern: most people discover they have a “usual” type or two, and that discovery is the baseline that makes genuine change visible. One unusual type is trivia; a drift in your usual type across two weeks is information — the whole case for tracking in one sentence.

Frequently asked questions

Is there an app that tells you your Bristol stool type?

Yes. Stoolio identifies your Bristol type from a scan — automatically, with the same criteria every time — and files it into your history alongside color, indicators, and your Stoolio Score.

Is there a free Bristol stool chart app?

Stoolio is free to download and your first three scans are free, each with a full readout including your Bristol type. Ongoing scanning is part of Stoolio Pro at $29.99/year or $9.99/month.

What is a normal Bristol stool type?

The middle of the scale is where typical, easy-to-pass stool tends to sit, but the more useful reference is your own usual — types vary person to person and day to day with completely ordinary inputs like water, fiber, and travel. A scanning history shows you your normal instead of a textbook’s. Questions about your health itself belong with a healthcare professional; Stoolio is a wellness tool, not a diagnostic one.

Can the app get my type wrong?

Any single classification is a visual estimate — light and framing matter, and the app coaches you on both. The design compensates with volume: classifications produced identically, dozens of times, make the trend trustworthy even when one reading is imperfect.

Do I still need to check anything myself?

A glance never hurts — it takes seconds and pairs naturally with a scan. Our 30-second checking routine covers what to look at and how the scan captures it for you.

Want to know your type — and your usual type? Try Stoolio free and see your first full readout in seconds.