# VO2 Flow vs Kotonemu

The clearest difference is ads: Kotonemu at none against VO2 Flow's shown. VO2 Flow's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. VO2 Flow sells 1 one-off in-app purchase and Kotonemu sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | VO2 Flow | Kotonemu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vo2-flow-norwegian-4x4-timer/id6757104585/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 38 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CHRISTOPHER DISCOTTO](https://appshunter.io/developer/1864553330) | [GYOU GI](https://appshunter.io/developer/6776104453) |

## What reviewers say

### VO2 Flow

[App page](https://appshunter.io/ios/app/vo2-flow-norwegian-4x4-timer/id6757104585)

This interval training app guides you through the Norwegian 4x4 protocol or allows you to create custom workout routines. It offers audio cues, haptic feedback, and music integration to enhance your training sessions. Track your progress with workout history and unlock achievements.

**Highlights:** Norwegian 4x4 protocol, Custom interval creation, Workout history tracking, Apple Music integration, Audio cues and haptic feedback, Achievement badges

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


### Kotonemu

[App page](https://appshunter.io/ios/app/kotonemu/id6800693416)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| At Your Ear | $12.99 | one-time |
| All Night | $12.99 | one-time |


## Frequently asked questions

### Is VO2 Flow free?

VO2 Flow is free to download, with in-app purchases available.

### Is Kotonemu free?

Kotonemu is free to download, with in-app purchases available.

### Do VO2 Flow or Kotonemu have ads?

VO2 Flow shows ads; Kotonemu does not.

### Which is updated more often, VO2 Flow or Kotonemu?

VO2 Flow ships an update every 5 weeks, and Kotonemu every 5 weeks. Most recently, VO2 Flow was updated on October 30, 2026 and Kotonemu on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*