Number Two is a bowel health tracker you won't mind opening in public. Nothing embarrassing - just clean, medical-grade design with personality. Log in seconds with the Bristol Scale. Track patterns with a color-coded calendar, contribution grid, and regularity score. Get AI-powered weekly insights. Compete on anonymous leaderboards with trophies. Everything on-device, optional cloud sync. Apple Watch and widgets included. Pro: AI insights, unlimited history, PDF reports. 7-day free trial.