Best Metabolic Health Apps (2025): Beyond CGM
Not ready for CGM? These apps help track metabolic health without wearing a sensor.
For CGM-based tracking, see: Best CGM for Non-Diabetics.
Top Metabolic Health Apps
| App | Price | Focus |
|---|---|---|
| Cronometer | Free / $50/yr | Detailed nutrition tracking |
| Zero | Free / $70/yr | Fasting tracker |
| Lumen | $299 device + subscription | Metabolic state via breath |
| MacroFactor | $72/yr | Adaptive calorie tracking |
| Carbon | $120/yr | AI macro coaching |
Best for Micronutrient Tracking: Cronometer
The gold standard for detailed nutrition analysis.
- Tracks 80+ nutrients (not just macros)
- Large verified food database
- Import wearable data (Oura, etc.)
- Free version is robust
Pros
- Most detailed nutrient tracking
- Excellent free tier
- Scientific accuracy
Cons
- Manual food logging required
- Less “lifestyle” focused
Best for Intermittent Fasting: Zero
The most popular fasting timer and tracker.
- Timer for various fasting protocols
- Journal and insights
- Content library on fasting
- Integrates with Apple Health
Pros
- Simple, well-designed
- Free for basic use
- Backed by Dr. Peter Attia
Cons
- Premium features pricey ($70/yr)
- Fasting-only focus
Breath-Based Metabolic Tracking: Lumen
Measures metabolic fuel (carbs vs fat) via breath CO2 analysis.
- Device: $299 handheld breathalyzer
- Subscription: Required for full features
- Measures: Whether you’re burning carbs or fat
See detailed review: Lumen Metabolism Tracker Review
Adaptive Calorie Tracking: MacroFactor
AI-driven macro tracking that adapts to YOUR metabolism.
- Learns your actual metabolic rate from data
- Adjusts targets based on results
- Created by Stronger By Science team
- Evidence-based approach
Pros
- Adapts to your real metabolism
- Science-backed
- No generic formulas
Cons
- Requires consistent logging
- Paid only (no free tier)
AI Macro Coaching: Carbon
Layne Norton’s app with AI coaching for body composition.
- Weekly check-ins with adjustments
- Macro recommendations based on goals
- Backed by nutrition PhD expertise
Comparison by Use Case
| Goal | Best App |
|---|---|
| Track all nutrients | Cronometer |
| Intermittent fasting | Zero |
| Know if burning fat | Lumen |
| Adaptive calorie targets | MacroFactor |
| Body recomposition | Carbon |
| Real-time glucose | CGM platforms |
Verdict
For comprehensive tracking without CGM: Cronometer + Zero covers nutrition and fasting.
For adaptive approach: MacroFactor learns your actual metabolism.
For metabolic state: Lumen (breath-based) or CGM (glucose-based).
For CGM-based tracking, see: Best CGM for Non-Diabetics.