# Tabata & HIIT Timer - PEAKVO2 — Interval Training & Endurance

> VO2 max interval training app with science-backed protocols and activity tracking. (iPhone/iPad app by Cristian Serb.)

- Source: https://appshunter.io/ios/app/tabata-and-hiit-timer-peakvo2/id6532617265 (this page in markdown: same URL + `.md`)
- Developer: [Cristian Serb](https://appshunter.io/developer/294833680)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases (on sale, was $3.99)
- Age rating: 4+
- Requires: iOS 18.0 · 14 MB
- Languages: American English, Czech, Danish, French (France), German (Germany), Hebrew, Indonesian, Italian, Japanese, Polish and 2 more
- Released: 2024-12-18
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/tabata-and-hiit-timer-peakvo2/id6532617265/reviews.md

## What is Tabata & HIIT Timer?

PEAKVO2 is a VO2 max training app built around the interval protocols that actually move the needle:
Norwegian 4x4, Tabata, HIIT 30/30, and more.

Pick a workout, press start, and the app guides you through every phase: warm-up, work intervals, recovery, and cooldown.

Why VO2 max?
VO2 max is the single best predictor of cardiovascular fitness and long-term health. Improving it doesn't require guesswork, it requires the right intervals, done consistently. PEAKVO2 gives you both.

What's included:
24 science-backed interval protocols, including the Norwegian 4x4, Tabata, and HIIT 30/30
Build your own custom interval workouts
Color-coded workout timer with automatic phase transitions
Activity tracking with streak, year in review, and training minutes
Works with running, cycling, rowing, and indoor cardio

Free to start. 4 workouts are yours forever — no strings attached. Unlock all protocols, custom workouts, and full activity tracking with a subscription or one-time lifetime purchase.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Science-backed interval protocols (Norwegian 4x4, Tabata, HIIT)
- Color-coded workout timer with phase transitions
- Activity tracking with streaks and progress
- Supports running, cycling, rowing, and indoor cardio
- Fitness age estimation

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlimited | $0.99 | per month |
| Unlimited | $8.99 | per year |
| Unlimited | $4.99 | per 3 months |
| Unlimited | $11.99 | per 6 months |
| Unlimited | $3.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $17.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/tabata-and-hiit-timer-peakvo2/id6532617265/reviews.md

### 5/5 — It makes me focus on my workouts, AMAZING !!!

*2025-07-12, version 2.1.3*

It’s hard to find a good app to help you with workouts and motivate you to keep your body healthy, this one is perfect!

### 5/5 — Amazing

*2025-07-12, version 2.1.3*

It helped me to know my VO2 max even though I don’t own any smartwatch. The workouts are so short that’s is easy to add them to your weekly routine.

## Frequently asked questions about Tabata & HIIT Timer

### What is PEAKVO2's VO2 max training?

PEAKVO2 offers interval training protocols like Norwegian 4x4, Tabata, and HIIT 30/30 designed to improve your VO2 max, a key indicator of cardiovascular fitness and health. The app guides you through each phase of the workout.

### What types of workouts does PEAKVO2 support?

PEAKVO2 supports a variety of cardio activities including running, cycling, rowing, and indoor cardio machines. It provides structured intervals for each.

### How much does PEAKVO2 cost?

PEAKVO2 is free to try with your first 3 workouts. Unlimited access can be unlocked with a one-time purchase, with options ranging from $2.99/month to $22.99/year. There are no subscriptions.

### Does PEAKVO2 have ads?

No, PEAKVO2 is ad-free. The app focuses on providing a clean workout experience without interruptions from advertisements.

### What devices does PEAKVO2 work on?

PEAKVO2 is currently supported on iPhone. It was last updated on March 26, 2026, with version 3.0.2.

### Can I track my progress with PEAKVO2?

Yes, PEAKVO2 includes activity tracking features that monitor your workout streaks, VO2 max progress, and total training minutes. This helps you visualize your improvements over time.

### What is the age rating for PEAKVO2?

PEAKVO2 has an age rating of 4+ on the App Store, making it suitable for a wide range of users interested in improving their fitness.

### Does PEAKVO2 offer a free trial?

Yes, PEAKVO2 offers a free trial period for some of its subscription plans. For example, the $3.99/month plan includes a 7-day free trial.

## Version history (last 5 releases)

### 5.4.1 — 2026-08-18

Your workout summary now reliably appears when you finish. It was being dropped on its way in, which also meant the app almost never got round to asking what you think of it. Stopping a workout early now shows the summary too, clearly marked as cancelled rather than complete.

### 5.4.0 — 2026-08-12

Your workout now lives on the lock screen. The countdown keeps running while your phone is locked or the app is closed, and it no longer loses time if you step away mid interval. You can also send the Cooper Test, the 1.5 Mile Run and the Rockport Walk Test to the Workout app on your Apple Watch, run them there, and PEAKVO2 works out your result from what the watch measured.

### 5.3.1 — 2026-08-11

A new Help and FAQ section in Settings. How to get your VO2 max into Apple Health and where to find it in the app, why Apple's own Cardio Fitness reading may be missing, how to connect a heart rate monitor over Bluetooth, and how the Apple Watch side works.

### 5.3.0 — 2026-08-07

Train anywhere with no equipment. The Tabata Protocol and HIIT 30/30 now name the movement for every interval, burpees, mountain climbers, squat jumps and jumping jacks, so you can prop the phone up and follow along. Each one comes with a short how to before you start.

### 5.2.2 — 2026-08-04

Bugfixes

## Apps similar to Tabata & HIIT Timer

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [VO2Max Training](https://appshunter.io/ios/app/vo2max-training/id6751254440) | 4.5 (8) | Free | Health & Fitness |
| [VO2 Max Pro: Track Fitness Age](https://appshunter.io/ios/app/vo2-max-pro-track-fitness-age/id6740225781) | 4.7 (32) | Free | Health & Fitness |
| [12 Minute VO2 Max](https://appshunter.io/ios/app/12-minute-vo2-max/id6745093199) | — | Free | Health & Fitness |
| [Cardiolytics: VO2 Max Health](https://appshunter.io/ios/app/cardiolytics-vo2-max-health/id6749484835) | 4.1 (17) | Free | Health & Fitness |
| [VO2 Max Trainer: HIIT, Zone 2](https://appshunter.io/ios/app/vo2-max-trainer-hiit-zone-2/id6736629740) | 3.0 (2) | Free | Health & Fitness |
| [VO2 max Hero - AI Tracker](https://appshunter.io/ios/app/vo2-max-hero-ai-tracker/id6745514867) | 1.0 (1) | Free | Health & Fitness |

## More apps by Cristian Serb

- [Remember Me? *lite](https://appshunter.io/ios/app/remember-me-lite/id294833677)
- [Remember Me? *pro](https://appshunter.io/ios/app/remember-me-pro/id382008584)
- [BeepRunner: Pacer & Beep Test](https://appshunter.io/ios/app/beeprunner-pacer-and-beep-test/id6760191894)
- [RockScan - Rock Scan & ID](https://appshunter.io/ios/app/rockscan-rock-scan-and-id/id6761328525)

All apps by Cristian Serb: https://appshunter.io/developer/294833680

## Related topics

[endure timer](https://appshunter.io/ios/topics/endure-timer) · [vo2max training](https://appshunter.io/ios/topics/vo2max-training)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*