FastingWorks
LiveTrack fasting windows and meals, then see how they affect your sleep, energy, and glucose. The patterns become obvious.
See what actually moves your health.
Track fasting, meals, sleep, and recovery in one place. Tab0 apps connect the dots so you stop guessing and start seeing cause and effect.
Research-backedOn-device AIPrivacy-first
9:41
Today
Good morning
February 2026
Intermittent FastingFat Burning
Fat Burning
89%•2h 0m left
Today's Meals3 logged
Greek Yogurt BowlBreakfast • 3 items • 8:30 AM
417kcal
Grilled Salmon SaladLunch • 3 items • 12:30 PM
545kcal
Apple & Almond ButterSnack • 2 items • 3:30 PM
285kcal
Caffeine2 logged
185/400
Green Tea35 mg• 2:00 PM
Americano150 mg• 9:00 AM
CaloriesDaily Goal
1,247remaining
Eaten1,247kcal
Limit2,000kcal
Macros
Protein68g136%
Carbs142g57%
Fat45g69%
Intake TrackingDaily Limits
Sugar
56%28g
Sodium
63%1450mg
Cholesterol
62%185mg
Fiber
72%18g
Key Micronutrients
Vitamin D
60%12.0mcg
Calcium
73%950mg
Magnesium
76%320mg
Iron
78%14.0mg
Zinc
86%9.5mg
Vitamin C
94%85.0mg
Products
Apps that go deep on what matters.
Each app focuses on one health signal. Together, they build your complete picture.
GlucoseWorks
Coming SoonKnow which meals spike your glucose before they happen. Personalized forecasts based on your data, not population averages.
Join waitlist
HRVWorks
ResearchUnderstand your recovery capacity in context. HRV interpreted alongside sleep, stress, and training load.
In research
Why Tab0
Built on principles, not hype.
Health apps make big promises. We'd rather show our work.
Research-backed
Every feature starts from peer-reviewed evidence. We cite our sources and document how research becomes product logic.
Private by default
Your health data stays on your device. Core analysis runs locally — no cloud uploads required for the prediction engine.
Transparent method
You can see why the app recommends what it does. No black boxes, no unexplained scores.
How It Works
Three steps to clarity.
Stop collecting data you never use. Start seeing the connections.
01
Track
Log meals, fasting windows, and daily habits. Wearable data syncs automatically from Apple Health.
02
Connect
The app maps your inputs to outcomes — how last night's meal affected this morning's glucose, sleep, and energy.
03
Act
Get clear, evidence-based suggestions on what to adjust and when. Then track the results.
This is not another dashboard full of numbers. It's a system that helps you understand what actually works for your body.
Vision
A personal health operating system.
Today's health apps give you data. We're building something different — a system that models cause and effect for one person: you.
Signals converging
Heart rate, HRV, sleep, activity, nutrition, and glucose — streams that used to live in separate apps now feed one model.
Research operationalized
Medical literature is moving from correlation to causation. We translate those findings into product logic you can act on.
AI that stays local
Modern devices can run simulation and prediction on-device. Your data never needs to leave your phone.
Team
Small team, high conviction.
Health science, product engineering, and design — integrated in one team that ships fast and uses what we build.
We optimize for compounding outcomes, not feature volume. Every product decision starts with a question: does this help someone make a better health choice?
Dogfooding
We use our own products daily. Internal friction directly shapes what we build next.
Compounding
Each unit of work makes the next one easier. Lessons become reusable standards.
End-to-End
Own outcomes from hypothesis to shipped behavior and measured impact.
Start understanding your health.
FastingWorks is free to try. See cause and effect in your own data.
Get FastingWorks