# 9Round Pulse vs VO2

The clearest difference is iOS requirement: 9Round Pulse at 11.0 against VO2's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

9Round Pulse ships an update every 3 months, VO2 every 4 months. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 9Round Pulse | VO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (62 ratings)](https://appshunter.io/ios/app/9round-pulse/id1203838164/reviews)** | — |
| Number of ratings | **62** | — |
| Positive reviews | 7.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free | — |
| Size | 15 MB | 31 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nci Technology Inc.](https://appshunter.io/developer/868272704) | [V O TWO GYM](https://appshunter.io/developer/1782086395) |

## What reviewers say

### 9Round Pulse

[App page](https://appshunter.io/ios/app/9round-pulse/id1203838164)

This app functions as a heart rate monitor specifically designed for training sessions. It helps users track their workout intensity and performance during fitness activities.

**Highlights:** Heart rate monitoring, Workout intensity tracking, Performance analysis, Fitness training support

**In-app purchases:** none


### VO2

[App page](https://appshunter.io/ios/app/vo2/id6738731923)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 9Round Pulse free?

9Round Pulse is free to download, with no in-app purchases.

### Is VO2 free?

VO2 is free to download, with no in-app purchases.

### Do 9Round Pulse or VO2 have ads?

Neither 9Round Pulse nor VO2 shows ads.

### Which is updated more often, 9Round Pulse or VO2?

9Round Pulse ships an update every 3 months, and VO2 every 4 months. Most recently, 9Round Pulse was updated on October 18, 2026 and VO2 on October 6, 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.*