# KooSync vs VesperX

The clearest difference is in-app purchases: KooSync at none against VesperX's 7. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. VesperX sells 7 in-app purchases, starting at $14.99 per month. KooSync asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 7, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | KooSync | VesperX |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 150 MB | 127 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [宇森 吴](https://appshunter.io/developer/1837612323) | [VINETALK INTERACTIVE PTE. LTD.](https://appshunter.io/developer/1822480749) |

## What reviewers say

### KooSync

[App page](https://appshunter.io/ios/app/koosync/id6752115401)

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

**In-app purchases:** none


### VesperX

[App page](https://appshunter.io/ios/app/vesperx/id6761097115)

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $14.99 | per month |
| star.5 | $7.59 | one-time |
| star.10 | $14.49 | one-time |
| star.30 | $42.00 | one-time |
| star.50 | $67.90 | one-time |
| star.100 | $130.99 | one-time |
| star.200 | $250.00 | one-time |


## Frequently asked questions

### Is KooSync free?

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

### Is VesperX free?

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

### Do KooSync or VesperX have ads?

Neither KooSync nor VesperX shows ads.

### Which is updated more often, KooSync or VesperX?

KooSync ships an update every 3 weeks, and VesperX every 3 weeks. Most recently, KooSync was updated on October 7, 2026 and VesperX on October 5, 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.*