# V.O2 vs RunKASI

V.O2 and RunKASI both sit at 4.9 stars, but that hides the real split: 100% of RunKASI's written reviews are positive against 71% of V.O2's. V.O2's advantage is update cadence (weekly vs every 5 weeks) and ratings volume (6.3K vs 7). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. V.O2 sells 16 in-app purchases, starting at $12.99 per month and RunKASI sells 2 in-app purchases, starting at $59.99 per 6 months. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for V.O2 against 5.0 for RunKASI. That said, the two scores are not equally well evidenced: V.O2 has 6.3K ratings behind it against 7, so its average is the more settled of the two. Written reviews are what separate them: 71% of V.O2's written reviews are positive against 100% of RunKASI's.

V.O2 ships an update weekly, RunKASI every 5 weeks. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | V.O2 | RunKASI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (6.3K ratings)](https://appshunter.io/ios/app/vo2-running-coach/id977666802/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/runkasi/id6502329451/reviews)** |
| Number of ratings | **6.3K** | 7 |
| Positive reviews | 71.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 142 MB | 27 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [The Run SMART Project, LLC](https://appshunter.io/developer/973571013) | [KASI, LLC](https://appshunter.io/developer/1745033573) |

## What reviewers say

### V.O2

[App page](https://appshunter.io/ios/app/vo2-running-coach/id977666802)

This app provides adaptive training plans and personalized coaching for runners of all levels. It assesses your fitness, offers custom paces, and syncs with popular devices. Train intelligently to achieve measurable improvements and become your best runner.

**Highlights:** Adaptive training plans, VDOT fitness assessment, Personalized training paces, Sync with Apple Health, Coros, Garmin, Strava, Real-time guidance on Apple Watch, Coros, Garmin, Training adaptation based on improvement, Coach communication and training adjustments

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Adaptive Training Subscription | $12.99 | per month |
| Adaptive Training - Annual | $99.99 | per year |
| Base/Fitness - 8 weeks | $44.99 | one-time |
| Half Marathon - 12 weeks | $54.99 | one-time |
| 10 Km - 12 weeks | $54.99 | one-time |
| 5 Km - 12 weeks | $54.99 | one-time |
| 1500m - 12 weeks | $54.99 | one-time |
| 3 Km - 12 weeks | $54.99 | one-time |
| Marathon - 15 weeks | $69.99 | one-time |
| Half Marathon - 15 weeks | $69.99 | one-time |
| Marathon - 18 weeks | $79.99 | one-time |
| Half Marathon - 18 weeks | $79.99 | one-time |
| Jack's Elite Marathon - 18wks | $79.99 | one-time |
| Jack's First Marathon - 18wks | $79.99 | one-time |
| Jack's Boston Marathon - 18wks | $94.99 | one-time |
| Marathon - 24 weeks | $99.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Great integration with Garmin watches
- 💡 Excellent for coaching and athlete communication
- 👍 Fantastic adaptive programming and training plans
- 👍 Seamless sync with Garmin and other platforms

**What reviewers complain about**

- 🐛 Issues with syncing to Garmin and other platforms
- 🐛 Inconsistent performance and bugs
- 🐛 Difficulty editing or moving workouts
- 🐛 Inaccurate elevation and GPS tracking
- 🔍 Limited customization and preset workout options

**Reported bugs**

- Apple Watch app issues and lack of functionality
- Problems with syncing Garmin runs to the correct workouts
- Inconsistent elevation and GPS data
- Bugs and crashes when using the app

**Requested features**

- Ability to duplicate and edit workouts
- Improved Apple Watch and Health app integration
- More advanced adaptive training and automation
- Expanded cross-training and workout modalities
- Better user interface and workflow for coaches


### RunKASI

[App page](https://appshunter.io/ios/app/runkasi/id6502329451)

Receive real-time audio coaching during your runs, with personalized feedback based on your biometric data. Connect with remote human coaches who can monitor your progress and provide guidance from anywhere.

**Highlights:** Real-time audio coaching, Biometric data interpretation, Remote human coaching, Extensive workout menu, Apple Watch integration, Bluetooth earphone support

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Runner Semi Annual Plan | $59.99 | per 6 months |
| Runner Annual Plan | $83.90 | per year |


## Frequently asked questions

### Is V.O2 free?

V.O2 is free to download, with in-app purchases available.

### Is RunKASI free?

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

### Which has better reviews, V.O2 or RunKASI?

RunKASI is rated higher. V.O2 averages 4.9 out of 5 from 6.3K ratings, while RunKASI averages 5.0 from 7 ratings.

### Do V.O2 or RunKASI have ads?

Neither V.O2 nor RunKASI shows ads.

### Which is updated more often, V.O2 or RunKASI?

V.O2 ships an update weekly, and RunKASI every 5 weeks. Most recently, V.O2 was updated on October 29, 2026 and RunKASI on October 21, 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.*