# ZEST Client vs CoreUnit

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

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | ZEST Client | CoreUnit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 25 MB | 5 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ZEST Inc. (US)](https://appshunter.io/developer/1682277951) | [Younghan Kim](https://appshunter.io/developer/1859100256) |

## What reviewers say

### ZEST Client

[App page](https://appshunter.io/ios/app/zest-client/id6447696283)

**In-app purchases:** none


### CoreUnit

[App page](https://appshunter.io/ios/app/coreunit/id6759229546)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZEST Client free?

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

### Is CoreUnit free?

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

### Do ZEST Client or CoreUnit have ads?

CoreUnit shows ads; ZEST Client does not.

### Which is updated more often, ZEST Client or CoreUnit?

ZEST Client ships an update every 3 weeks, and CoreUnit every 3 weeks. Most recently, ZEST Client was updated on October 14, 2026 and CoreUnit 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.*