Stop counting calories. Start counting hours.
Fasting is the dominant lever for weight and metabolic health — about 70% of the outcome (Sutton 2018, Wilkinson 2020, Mattson NEJM 2019). Helix is the coach built around that fact: a timer that runs itself, plus an AI that reads your biometrics, your DNA, and the studies — so the rest just supports the only number that moves.
It cites the study, not the influencer.
Helix sees your sleep stages, HRV, steps, fast hours, and last workout before you say a word — and when it makes a claim, it pulls a peer-reviewed source, with the URL inline. No vibes. No fitness-blog folklore.
Try it
Pick a reply. Watch how Helix uses what it already knows about you.
It gets smarter the longer you use it.
Helix uses active learning. Each interaction sharpens your model — by month three it knows your failure modes, your comeback patterns, and what kind of nudge actually moves you.
Zero-effort data
HealthKit syncs steps, HRV, resting heart rate, workouts, weight — and Apple Watch sleep stages (REM / Core / Deep). No logging. No typing. Your coach reads what your body already wrote down overnight.
DNA-informed
Upload your 23andMe or AncestryDNA file once. Coaching adapts to your caffeine metabolism, sleep chronotype, and recovery genetics.
Cites the study, not the influencer
When Helix makes a factual claim, it searches PubMed, NEJM, Nature, NIH, Cochrane and Examine — then drops the URL inline. No invented citations. No fitness-blog folklore. Sources you can tap and verify.
DNA privacy first
Genetic data is parsed on-device and never uploaded. Only ~100–200 coaching-relevant markers are extracted. Raw files are deleted after parsing.
The timer is the hero
Fasting hours are the dominant lever (Sutton 2018, Wilkinson 2020 Cell Metabolism). Helix puts the counter front-and-center, ticks every second, and breaks the fast in one tap. No food log. No calorie math. Just the number that compounds.
Active learning
Every interaction teaches your coach something new. The app asks less and knows more the longer you use it.
The fast does the work. Everything else makes the fast easier to hold.
Fasting hours are ~70% of the result. The other layers — biometrics, DNA, behavior — exist to coach the timer: tell you when to break it, what to break it with, and why today's window is harder than yesterday's. Lever first. Support second.
Three minutes of setup. Then it gets out of your way.
Connect HealthKit
One tap. Steps, sleep, HRV, workouts, weight — Helix subscribes to whatever Apple's already collecting. No new wearable required.
Optional: drop in your DNA
Upload a 23andMe or AncestryDNA file once. We parse the markers we use, on your phone, then delete the raw file. You can revoke at any time.
Live your week
Helix watches, learns, and nudges. By month three the coaching feels less like an app and more like someone who's been paying attention.
Cheaper than a human coach. Smarter than any fitness app.
Cancel anytime. First 100 waitlist members lock founder pricing forever — across both paid tiers.
Try it
See what automated coaching feels like.
- Health dashboard
- 3 coaching messages per day
- Basic streaks
- HealthKit sync
Unlimited
Unlimited AI coaching, every mode.
- Unlimited coaching
- All coaching modes
- Proactive notifications
- Fasting timer
- Schedule-aware coaching
Genetic
Coaching powered by your genetics.
- Everything in Premium
- DNA upload & parsing
- Genetic coaching profile
- Caffeine, sleep, recovery insights
30-day retention in fitness apps averages 8–12%. The missing piece isn't motivation — it's automated context.
Manual logging dies the day motivation dips. Telemetry doesn't. Helix is built on the layer of you that keeps reporting in even when you've stopped trying.
Source · Sensor Tower, 2024