Everything you need to understand your gut.
From 30-second logging to doctor-ready PDF reports, GutLog is packed with thoughtful features designed specifically for managing chronic digestive conditions.
1. Quick Logging
Logging a bathroom visit shouldn't feel like a chore, especially when you're not feeling well. We designed GutLog's input screen to be entirely tap-based, allowing you to log a comprehensive entry in under 30 seconds. Track Bristol stool type, color, urgency, pain, symptoms, and context triggers like meals or stress.
2. History Calendar
Your data is beautifully visualized on a scrollable calendar. Each day shows a mini dot-plot of your entries, color-coded by Bristol type and flagged if pain or urgency was high. Free users get a 14-day window, while Pro users unlock unlimited history to see seasonal trends or track medication changes.
3. Correlation Engine
This is the heart of GutLog Pro. The Correlation Engine analyzes your logs to find hidden connections between your triggers and your symptoms. It automatically calculates the 'hit rate' for foods like Dairy or High-FODMAP, showing you exactly what precedes your worst flare-ups using a smart 4-hour deduplication window.
4. Analytics Suite
GutLog Pro provides beautiful charts to help you quantify your gut health. Track your Gut Health Score, Pattern Stability, Deep Trend Analysis, and Weekly Patterns. Get continuous insights and a 30-day overview right from your dashboard to finally make sense of your digestive health.
5. PDF Doctor Report
Gastroenterologists love data, but they hate scrolling through a patient's phone. With one tap, GutLog generates a beautifully formatted, multi-page PDF summarizing your Bristol averages, pain trends, top triggers, and red flags. You can print it or securely share it directly from your iPhone.
6. AI Prompt Generator
Want to ask ChatGPT or Claude about your symptoms? Don't type it all out manually. The AI Prompt Generator compiles your recent gut data into a structured, anonymized text prompt. Just tap 'Copy Prompt' and paste it into your favorite AI tool to get personalized insights instantly.
7. Privacy Architecture
Gut health is intimately personal. That's why GutLog is built with a local-only architecture. We use on-device storage to securely save your data. There are no GutLog servers storing your health logs, no accounts to create, and the app works 100% offline.
Stop guessing. Start knowing.
Download GutLog free on iPhone. No account. No subscriptions required to start.
Requires iOS 15.1 or later