Body
Your range, not a population chart. Each vital is read against the 28 days before it, so 40 bpm is judged against you.
hybridAF for iPhone
Lift heavy.
Run fast.
Your strength and your engine as one score, so you can stop guessing whether you are actually getting more complete.
Free on iPhone. No card.1
01The Hybrid Score
One number you can't fake by being good at half of it.
Strength and engine are graded on the same ladder, then combined so the weaker side counts for more.
- Your number, your rank.
- 60 is Gladiator I, about the top 45 percent.
- Strength 74.
- Your best lifts, graded against bodyweight.
- Engine 50.
- Estimated from a ride, and flagged as the side capping the score.
- What a point is worth.
- +0.33 for strength, +0.71 for engine.
The founder's own account, 29 Sep 20262
The arithmetic
Strength
74
Engine
50
- Average them
- 62
- The Hybrid Score
- 60
2 × 74 × 50 ÷ (74 + 50) = 59.7
Why
It is a harmonic mean, and that is the point. The weaker side pulls the number down harder than the stronger side lifts it, so the fastest way up is to close the gap. It falls when you stop training.
Both sides are graded against published population standards3 on one ladder, so 60 means the same standing whether it came from a barbell or a run.
The ladder
- Initiate0-34
- Warrior35-49
- Gladiator50-64
- Champion65-77
- Demigod78-91
- Titan92+
02How it fits a week
A week, measured.
From the morning reading to the number at the end of it, in five screens.
Today
Start with one reading.
Recovery, strain and sleep from Apple Health, one line on how your vitals sit against your normal, and a session sized to the time you have.
Plan
Let Atlas write the week.
It reads your calendar and your recovery, puts each session in a real gap and says why. Nothing lands until you accept it.
Train
Log it at the rack.
Every set opens on what you did last time. Tick it and the rest timer runs, in the app and on the lock screen.
Atlas
Ask why, get a session.
Atlas reads your sessions, recovery and calendar before it answers, and builds today's session for the side holding your number down. It proposes, you confirm.
Score
See what moved.
Patterns are found in your own logged data, and each one prints how strong the evidence is.
Rewrite my week and Atlas are part of Pro; free accounts get one Atlas turn a day.2
03Everything else
The rest of the instrument.
Your body, your lifts, your runs, HYROX, and the history you bring with you.
Lifts
Every lift has a page. Best estimated 1RM, heaviest set, rep maxes and the whole history.
Runs
Your runs, read. Time in each heart rate zone and your best sustained pace from 1 to 20 minutes.
Widget
Your number on the home screen. Both sides, recovery and the next session.
HYROX
Stations, circuits and race sims. The pace clock keeps running on the lock screen while you are on the erg.
Sources
Bring your history. Imported sessions count toward your number.4
- Apple Health
- Sync
- Strava
- Sync
- Google Calendar
- Planning
- Strong
- Import
- Hevy
- Import
04Evidence and privacy
Nothing hidden.
The research behind every number is public, and your data is never for sale.
The Science
39
Published sources behind the metrics. Where a number is our own design choice, like the harmonic mean, the science page says so.
Privacy
Your data stays yours. No ads, no selling, and the way out is one tap away.
- Never sold. Never used for ads.
- Export all of it as a file, any time.
- Delete your account from inside the app.
05Free and Pro
The score is never gated.
Your number, the radar and the share card stay free forever. Pro is everything that moves the number.
| Feature | Free | Pro |
|---|---|---|
| Hybrid Score and radar | ||
| Shareable score card | ||
| Manual logging and imports | ||
| History | 30 days | All of it |
| Atlas AI coach | 1 turn a day | 20 a day |
| Rewrite my week | ||
| A session for the time you have | 1 a day | |
| Next-load targets in the logger | ||
| Atlas edits your records and sessions |
Pro is an in-app subscription. Prices show in the app in your currency, and you can cancel any time in your Apple account settings.
See pricing06Estimate it
What's your number?
A few lifts and one run give an estimate from the same math the app uses. The app then measures it from what you actually log.
Your estimated Hybrid Score
35
Warrior III
≈ top 65%
± 22 points
Estimate accuracy0%
Add more below to sharpen it: the number tightens as you do.
Strengthest35
Engineest35
This is an estimate. The app measures the real thing: it logs your lifts, syncs your runs, and the number moves with you. Free on the App Store.
You
Strength
best set · kgSquat×
Bench×
Deadlift×
Overhead press×
Engine
07Guides and answers
One screen, one minute.
A short video for each screen of the app, and straight answers to what people ask first.
Guide 011:22
A quick tour of hybridAF
Guide 021:18
Setting up hybridAF and getting your first score
Guide 031:26
How to read your Hybrid Score
Is the score real or made up?
Both sides are graded against published population standards on one ladder. All 39 sources are public on the science page, which also says plainly which parts are our own design choices.
I already pay for Strava, Whoop or a coach.
It does not replace them. It reads from what you already use and gives the one answer none of them do: whether the way you split your week is making you a more complete athlete.
I don't race HYROX.
Neither do most people who use it. HYROX is one supported goal, not the point.
I don't have a watch.
The engine side falls back to a recent hard run. Everything else can be logged by hand.
What does hybridAF connect to?
Apple Health and Strava sync from the iPhone app. Google Calendar connects for planning your week. Strong and Hevy history imports from their CSV export. Anything else can be logged by hand. There is no direct connection to Garmin, WHOOP, Oura or Fitbit yet, though workouts and readings they save to Apple Health come in through it. Google Fit and Health Connect are Android services, and hybridAF is an iPhone app.
Is there an Android app?
No. hybridAF is an iPhone app.
Is my health data sold or used for ads?
No. Never.
