I built an iOS app to track gut health. Looking for beta testers
GitHub-style heat maps for bowel movements, but another tracker in a crowded App Store.

Privacy-focused glucose tracker for standard meters when CGM apps are locked down.
Diabetics using standard Bluetooth glucometers
Glucose Buddy · mySugr · Apple Health
Reads from HealthKit and pairs with the Bluetooth enabled Glucose Meters that don't roll their own crypto/weird standard. (standard GATT Glucose Profile). Data never leaves the device. No analytics SDKs, no third parties.
Not a CGM app — Libre and Dexcom users won't get value here. Those ecosystems already have decent native apps, and Libre's protocol is closed to third parties anyway..
Built for fingerstick users.
Looking for beta testers :)
GitHub-style heat maps for bowel movements, but another tracker in a crowded App Store.
Medical-grade fetal heartbeat detection already exists; this adds no real differentiator.
Privacy-focused booking app, but local-only storage contradicts multi-party scheduling needs.
Real problem, but Strava Groups and Meetup already solve this better.
The core idea is neat: put an RPN stack into a spreadsheet-like grid so you get both terse, stepwise entry and immediate dependency updates when you change an input. That combo feels like a thoughtful mobile-first answer to cramped phone spreadsheets. Main caveats: it's niche (RPN devotees) and the demo page gives little evidence about export, collaboration, or how complex formulas are expressed.
Live outdoor audio over local Wi-Fi beats sleep apps' fake recordings; genuinely novel constraint.