Understand your digestive patterns instantly
Free browser-based clinical calculators to estimate gut transit speed, analyze stool forms, and prepare structured prompts for AI models.
Stool Color & Clinical Indicator Checker
Evaluate stool color changes across brown, pale clay, yellow, green, black tarry, and bright red. Check bile flow and red-flag indicators.
- Evaluates bile flow, stercobilin, and transit speed
- Clinical red-flag alerts for melena and clay stool
- Step-by-step guidance on when to seek urgent care
FODMAP Stacking Calculator
Build a meal plate to detect cumulative carbohydrate stacking across fructans, GOS, and sorbitol before eating.
- Checks cumulative carbohydrate saturation
- Flags overlapping FODMAP categories
- Applies 3.5 to 4-hour clearance intervals
Rome IV IBS Subtype Screener
Evaluate your recurrent abdominal symptoms against Rome IV consensus criteria. Determine if your habits match IBS-C, IBS-D, IBS-M, or IBS-U.
- Evaluates 3-month pain chronicity and duration
- Scores Bristol stool consistency proportions
- Screens for organic alarm red flags
Bristol Stool Chart & Transit Calculator
Select your stool form, color, urgency, and pain level to estimate colonic transit hours and detect clinical bowel motility patterns.
- Estimates transit time from <10h to 100+ hours
- Clinical red-flag alert for black or red stool
- Assesses rectal tenesmus and pelvic floor signals
AI Prompt Generator for Gut Health
Convert your monthly Bristol percentages, pain averages, and suspected triggers into an anonymized clinical prompt for ChatGPT and Claude.
- 100% private and anonymized clinical prompt
- Generates physician discussion questions
- One-click copy to clipboard
Automate your symptom tracking on iOS
GutLog 1.5.6 records your bowel habits in 30 seconds, runs Poisson arrival trigger calculations, and exports A4 reports for your gastroenterologist.