GutLog vs Bowelle: Which IBS tracker is right for you?
The bottom line: Bowelle is a clean, minimalist daily logger ideal for users who want simple visual sliders for mood, stress, and bowel movements without complex data. GutLog is built for clinical diagnostic rigor: it operates 100% on-device with zero user accounts or cloud servers, features an automated Poisson arrival baseline correlation engine across 6 lag windows (2 to 36 hours), and exports printable, A4-formatted clinical reports for gastroenterologists.
1. Data privacy & architecture
Your bowel habits and stool photos are among your most sensitive medical records.
100% local on-device SQLite database. Zero account creation, zero email signup, and zero cloud health storage. Your health data cannot leak because it never leaves your iPhone.
Requires user authentication and cloud synchronization to store your entries on remote database servers.
2. Trigger correlation mathematics
Identifying dietary triggers requires understanding digestion lag times. Food eaten at dinner ferments in the colon 6 to 18 hours later, not immediately.
Employs a Poisson arrival baseline model that measures whether pain or loose stool rates exceed your normal background baseline across 6 distinct lag windows: 2, 4, 8, 12, 24, and 36 hours.
Provides basic frequency charts showing how often you logged a symptom, but lacks automated mathematical lag-window correlation to separate coincidence from true triggers.
3. Physician reports & exports
Gastroenterologists have 15 minutes per consultation and cannot read raw spreadsheets.
Generates an A4 clinical PDF with Bristol Stool Form distribution percentages, pain averages, notable threshold events, and red-flag alerts formatted specifically for physician review.
Offers email export of text or basic CSV summaries that require manual physician interpretation.
Detailed feature breakdown
| Capability | GutLog | Bowelle |
|---|---|---|
| No account required | Yes (100% Local) | No (Account required) |
| Bristol Stool Scale logging | Types 1 through 7 | Custom visual scale |
| Digestion lag windows | 6 windows (2 to 36h) | None |
| Poisson trigger engine | Included | None |
| A4 doctor report PDF | Included | Basic export only |
| AI prompt generator | Included (v2 Architect) | None |
Ready for private, clinical tracking?
Download GutLog on your iPhone today. Track in 30 seconds, keep your health data 100% private on-device, and uncover true food triggers with mathematical precision.