VO2 Max Trainer vs Round Timer
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
VO2 Max Trainer
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Your VO2 max is a number. VO2 Max Trainer turns it into a training plan. Start from your current level, choose a goal, and see a realistic path forward. Then train with guided intervals, easy aerobic sessions, and progressive programs on iPhone and Apple Watch. START WITH YOUR NUMBER - Import Cardio Fitness readings from Apple Health. - Enter a result from a lab, watch, wearable, or previous test. - Get a starting estimate from your age, profile, and activity history. - Run a guided Cooper 12-minute, 1.5-mile, or Rockport 1-mile field test. FOLLOW A PROGRESSIVE PLAN - Choose from beginner, intermediate, and advanced programs lasting 8 to 12 weeks. - Set a VO2 max goal and see an estimated time to reach it based on your current level and weekly training dose. - Follow the next scheduled session or choose any workout when your week changes. TRAIN WITH 38 PROTOCOLS - Norwegian 4x4, 5 x 3, 8 x 2, Seiler 4 x 8, Billat 30/30, Ronnestad 30/15, Tabata, and more. - Dedicated packs for VO2 max intervals, short intervals, threshold, Zone 2, sprints, beginners, and field tests. - Switch sessions between running, walking, cycling, rowing, SkiErg, stairs, swimming, elliptical, Air Bike, or bodyweight. - Build a quick session or create and save your own interval workout. TRAIN FROM YOUR WRIST - Start supported sessions on Apple Watch. - See live heart rate, target zone, interval timing, and what comes next. - Review time in zone and completed work after the session. - Save completed Apple Watch sessions to Fitness. SEE WHAT IS CHANGING - Keep readings from Apple Health, field tests, manual entries, and other devices in one trend. - Compare your current number with your goal. - See fitness age and percentile context based on your profile. - Track your weekly hard-session dose, training history, awards, and statistics. VO2 max values produced by field tests and profile estimates are estimates, not lab measurements. VO2 Max Trainer is a fitness tool, not medical advice. Consult a qualified healthcare professional before beginning vigorous or near-maximal exercise. Questions or feedback? Contact us from Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://makerbox.notion.site/Workout-Tracker-Privacy-Policy-32cd30b69c4481aa857ff2419091132d
Round Timer
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Stop fumbling with complicated timers and start your workout in seconds. Get clear interval cues, a big easy-to-read countdown, and a round timer that keeps pace without breaking your flow. Round Timer: HIIT & Tabata helps you start, run, and track interval workouts on iPhone. Built for people who want to drop the phone, glance once, and keep moving, this HIIT timer focuses on quick starts and clear feedback. The GO card always launches your most recent workout, so your usual Tabata timer or interval timer is never more than one tap away. When a workout is running, the Live Activity and Lock Screen card keep the current phase, time left, and controls in view, and you can pause, skip, or stop from there. If you train with music, voice cues speak over your audio and then your music returns to normal volume. That makes it handy for Tabata abs while watching TV, sprint repeats at the track, or boxing rounds in the gym. โข Start your last workout instantly from the GO card on Quick Start. โข Pick from built-in presets including Classic Tabata, Beginner HIIT, EMOM 10, AMRAP 20, Boxing Rounds, and Sprint Intervals. โข Build custom workouts with your own work, rest, rounds, get ready, and cooldown times. โข Choose a protocol like Tabata, HIIT, EMOM, AMRAP, Circuit, Rounds, Sprint, or Custom. โข Add per-round labels so voice cues can say Burpees or Push-ups instead of a generic work prompt. โข See a giant full-screen countdown with color changes for work, rest, prep, cooldown, and finish. โข Keep the next step in view with the UP NEXT preview and the round counter. โข Control a session with large Restart, Play or Pause, and Skip buttons. โข Let a saved workout start a playlist from your music library automatically and stop it when the workout ends. โข Keep cues going when the screen locks, with optional haptics on every phase change. โข Check History for this week, total time, streak, and session details, then share or delete a session. โข Start from Home Screen, Lock Screen, Control Center, or a shortcut for even faster access. It fits real training moments. Start Classic Tabata for a quick core set, throw together a Circuit for class, run EMOM 10 in a garage gym, use Sprint Intervals for repeats, or keep Boxing Rounds visible from across the room. If you want one clean workout record instead of a pile of tiny entries, Pro can save each completed session to Apple Health as a single workout. The free version lets you save up to 3 custom workouts. Pro removes that limit and adds Apple Health saving for completed sessions. Music access is only needed if you want to play a playlist from your library, and Health access is only needed if you choose to save workouts there. Pick a preset, tap GO, and turn your iPhone into a clear, dependable HIIT timer for Tabata, EMOM, AMRAP, boxing rounds, and more. Terms of Use (EULA) - http://www.apple.com/legal/itunes/appstore/dev/stdeula
Screenshots
Verdict
The clearest difference is ads: VO2 Max Trainer at none against Round Timer's shown. VO2 Max Trainer also leads on update cadence (every 4 days vs every 2 months) and iOS requirement (17.0 vs 26.0). On price, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. VO2 Max Trainer sells 4 in-app purchases, starting at $4.99 per month and Round Timer sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
VO2 Max Trainer ships an update every 4 days, Round Timer every 2 months. The most recent releases landed on September 24, 2026 and September 2, 2026 respectively.
| Parameter | VO2 Max Trainer | Round Timer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days โ better | Every 2 months |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Apple Watch โ better | iPhone, iPad |
| Requires iOS | 17.0 โ better | 26.0 |
| Further details โ not scored | ||
| Size | 40 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Denis Kulkov | Sandeep Bhandari |
In-app purchases
VO2 Max Trainer
- Monthly7 Days trial$4.991 Month
- Weekly7 Days trial$4.997 Days
- Yearly7 Days trial$19.991 Year
- Lifetime access$24.99
Round Timer
- Pro Weekly$4.997 Days
- Pro Annual7 Days trial$29.991 Year
- Forever Pro$99.99







