# VO2 Flow vs Intervalla

The clearest difference is in-app purchases: Intervalla at none against VO2 Flow's 1. Intervalla also leads on ads (none vs shown). VO2 Flow's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. VO2 Flow sells 1 one-off in-app purchase. Intervalla asks for nothing beyond the download.

VO2 Flow ships an update every 5 weeks, Intervalla every 3 weeks. The most recent releases landed on September 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | VO2 Flow | Intervalla |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Size | 25 MB | 3 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHRISTOPHER DISCOTTO](https://appshunter.io/developer/1864553330) | [LJOSNING AS](https://appshunter.io/developer/1831022124) |

## What reviewers say

### VO2 Flow

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

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

**In-app purchases (1)**

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


### Intervalla

[App page](https://appshunter.io/ios/app/intervalla/id6760928874)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VO2 Flow free?

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

### Is Intervalla free?

Intervalla is free to download, with no in-app purchases.

### Do VO2 Flow or Intervalla have ads?

VO2 Flow shows ads; Intervalla does not.

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

VO2 Flow ships an update every 5 weeks, and Intervalla every 3 weeks. Most recently, VO2 Flow was updated on September 25, 2026 and Intervalla on September 9, 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.*