VO2 Prime vs Just VO2 Max
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VO2 Prime
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This app transforms VO2 Max and Resting Metabolic Rate (RMR) test results into daily guidance for nutrition and recovery optimization. Users can track how their body burns fat vs carbs, monitor biological age, and receive tailored insights for training and lifestyle. It provides access to personalized meal plans, recipes, and workout builders — all powered by personal metabolic analysis and breath-based testing. Key Features: • Dashboard with activity, nutrition, recovery, and metabolic data. • Personalized nutrition planning with meal plans and smart recommendations. • Training builder aligned with VO2 Max and RMR test results. • Recovery tracking with biological age and fat vs carb burn metrics.
Just VO2 Max
Displays your most recent VO2 Max reading from Apple Health directly on your Apple Watch face. It refreshes automatically when new data is available after your workout, keeping your health information private and on your device.
- VO2 Max display
- Apple Health integration
- Automatic refresh
- On-device data storage
- Read-only data access
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Your VO₂ max, wherever you look first. Just VO2 Max brings your latest Apple Health estimate to three equally important places: your Apple Watch face, iPhone Home Screen, and iPhone Lock Screen. Check your value without opening an app. ON YOUR WATCH FACE Choose a circular, rectangular, or corner complication. The rectangular style also shows your trend and measurement date and time. ON YOUR HOME SCREEN Choose a small, medium, or large widget. Each shows your value, trend, and measurement date and time. The large widget adds a chart of up to six recent readings. ON YOUR LOCK SCREEN Choose a circular gauge or rectangular widget. The rectangular style shows your value, measurement date and time, and trend when available. COMPANION APPS Use the iPhone and Apple Watch apps to grant read-only Health access and view the latest reading. The Watch app updates when opened. The iPhone app also shows up to six recent readings, with controls to refresh and check setup. The iPhone dashboard adapts to iPhone Duo’s closed and unfolded displays, in portrait and landscape. SIMPLE AND PRIVATE • Free, with no account or subscription • Read-only access to VO₂ max in Apple Health • Health readings stay on your devices • No ads in widgets, complications, or the Watch app • The iPhone companion app is supported by banner ads Just VO2 Max displays estimates already stored in Apple Health. It does not measure or calculate VO₂ max. New readings depend on Apple Health and supported workouts; iOS and watchOS manage refresh timing. The trend compares your latest estimate with up to three previous readings. Your VO₂ max values, sample dates, and sources are never sent to advertising or analytics providers. The app displays fitness information only and does not provide medical advice.
Screenshots
Verdict
The clearest difference is ads: VO2 Prime at none against Just VO2 Max's shown. VO2 Prime also leads on iOS requirement (15.1 vs 17.0). Just VO2 Max's advantage is update cadence (every 6 days vs monthly). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
VO2 Prime ships an update monthly, Just VO2 Max every 6 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.
| Parameter | VO2 Prime | Just VO2 Max |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Monthly | Every 6 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 62 MB | 14 MB |
| Age rating | 17+ | 4+ |
| Developer | EndoMedical Inc | Cuprea s.r.o. |
In-app purchases
VO2 Prime
No in-app purchases
Just VO2 Max
No in-app purchases









