AI Health Tracking Without the Hype
Most AI health apps want to be your doctor. That's a dangerous mistake. Here's the open-source tracker that stays in its lane — and keeps your data private.
🧭 What Should You Track?
Not everyone needs the same data. Here's the right tracking plan for your goals.
Recommended: Daily Food + Mood Logging
For general wellness on a phone, start with meal logging and a daily check-in. Use FitBuddy's photo logging and built-in simulator — no API key required to start.
as of 2026-08-20
— Contrarian Take, Everyday AI Done Right
Step-by-Step Walkthrough
Contrarian Correction: Most guides tell you to trust AI health apps for medical advice. That's backwards. Even apps with "therapist" in the name explicitly warn: "This is not a substitute for professional care." [citation:2][citation:3][citation:7]
So What? Relying on AI for medical advice could delay real care. Use AI for tracking, not diagnosis.
FitBuddy is a free, open-source health tracker for Android [citation:4].
- Android only: Available on F-Droid (free, no Google Play required).
- No account required: Install and open.
- No ads, no tracking by default [citation:4].
f-droid.org/packages/com.anant.fitbuddy/
FitBuddy can run entirely offline using its built-in simulator [citation:4]. For photo logging, configure an AI provider:
- Ollama (Local): Install Ollama, pull a vision model (e.g., LLaVA), point FitBuddy to
http://localhost:11434— 100% free, fully local. - Google Gemini: Free API key from Google AI Studio.
- OpenRouter: Free vision models with automatic model dropdown.
Snap a photo of your food or type what you ate. The AI estimates calories and macros instantly. Review ingredients, adjust weights, and save [citation:4].
So What? Logging just one meal breaks the inertia. Once you see the macro breakdown, you'll understand your eating patterns.
For meals you eat regularly, save them as presets. Next time, it's one tap to log [citation:4].
Your dashboard shows: daily calorie ring, combined food/exercise log, macro breakdown, and custom charts tracking trends over time [citation:4].
⚠️ What Breaks (Limitations)
- It's not a doctor. The app is a tracker, not a diagnostician. So what? Trusting it to diagnose you could be harmful.
- Photo logging requires an AI key. Without configuring an AI provider, you can still log manually or use the simulator [citation:4].
- Android only. No iOS version at this time.
- Beta features. AI chatbot and multi-user support are in beta and may have bugs [citation:4].
This guide is for informational purposes only. AI health tools are not substitutes for professional medical advice, diagnosis, or treatment.