# NineTrack vs K

The clearest difference is in-app purchases: NineTrack at none against K's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. K sells 2 in-app purchases, starting at $9.99 per month. NineTrack asks for nothing beyond the download.

NineTrack ships an update every 3 weeks, K monthly. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | NineTrack | K |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 48 MB | 109 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen Yi Wen Technology Co., Ltd.](https://appshunter.io/developer/1298964548) | [Mosen Future Tech Limited](https://appshunter.io/developer/1895701655) |

## What reviewers say

### NineTrack

[App page](https://appshunter.io/ios/app/ninetrack/id6746105403)

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

**In-app purchases:** none


### K

[App page](https://appshunter.io/ios/app/k-bit/id6764252313)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SOUL+ Monthly | $9.99 | per month |
| SOUL+ Yearly | $99.99 | per year |


## Frequently asked questions

### Is NineTrack free?

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

### Is K free?

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

### Do NineTrack or K have ads?

Neither NineTrack nor K shows ads.

### Which is updated more often, NineTrack or K?

NineTrack ships an update every 3 weeks, and K monthly. Most recently, NineTrack was updated on October 2, 2026 and K on October 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.*