OxyScore: VO2max & Fitness Age
Tests, intervals, strength log
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
New: a Strength tab beside your VO2max. Keep your own strength log, reps and weight, and walk into the gym knowing the weight to beat.
Two things you can train are tied to a longer life: your VO2max, the fitness measure most linked to longevity, and your strength. OxyScore keeps both in one place. Measure your VO2max properly, train it on your wrist, and keep the record of what you lift beside it.
MEASURE IT PROPERLY
Three guided field tests — Cooper, Rockport walk and an indoor max effort — turn one real effort into a measured VO2max, with its accuracy range and the study behind it shown in the app.
SEE WHAT IT MEANS
• Fitness age — the age your VO2max says you are — with your percentile (FRIEND registry)
• Your fitness category, from a 122,007-person study (Mandsager 2018)
• Heart-rate recovery, resting heart rate and HRV, never blended into a score
TRAIN IT ON APPLE WATCH
Five cited protocols — Norwegian 4×4, VO2max 4×3, 10-20-30, Billat 30-30 and Zone 2 — coached live on your wrist with haptic cues. A hard interval asks for at least 90% of your max heart rate — a floor to reach, not a cap. Your numbers show on iPhone; guided sessions need Apple Watch.
STRENGTH, THE OTHER HALF
Strength training is associated with lower all-cause mortality, and the largest association of all is for people who do it alongside aerobic training (Momma 2022). Keep your own exercise list and log reps and weight. Every exercise shows your last session's top set, your estimated max and whether it moved, so you arrive knowing the weight to beat. A record you keep, not a score the app awards.
YOUR WEEK, PLANNED FOR YOU
One adaptive weekly goal, sized to your fitness, stepping up when you're ready; a rough week gets a real deload. On supported iPhones, Apple Intelligence writes it from verified numbers.
IT COMPOUNDS
Weekly streaks, 34 achievements, a training level only real work moves, monthly Longevity Reports.
PRIVATE BY DESIGN
Your health data never leaves your devices. No accounts, no tracking, no analytics — everything computes on-device from Apple Health, where workouts save back.
OxyScore Membership covers measurement, coaching and progress, with Family Sharing. It renews automatically unless canceled at least 24 hours before the period ends. Free trials are for new subscribers, one per Apple ID; cancel any time in Settings.
OxyScore is a fitness app, not a medical device, and does not diagnose or treat any condition. Consult your physician before beginning vigorous exercise.
Terms: https://oxyscore.fit/terms · Privacy: https://oxyscore.fit/privacy
Ratings & Reviews
A Strength tab: keep your own list of exercises, log reps and weight, and see your last session's top set, whether it moved, and your estimated max.
The Dashboard carries the exercise at the top of your Strength list, beside your VO2max.
The developer, KIRILL PUSTOVALOV, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KIRILL PUSTOVALOV
- Size
- 6.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- OxyScore Yearly $29.99
- OxyScore Monthly $4.99
- Copyright
- © 2026 Kirill Pustovalov
