# Sunduk vs ZON

The clearest difference is ads: Sunduk at none against ZON's shown. Sunduk also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). ZON's advantage is update cadence (every 5 days vs every 4 months). On price and in-app purchases there is nothing between them.

Both are free to download. Sunduk sells 3 one-off in-app purchases and ZON sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Sunduk ships an update every 4 months, ZON every 5 days. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Sunduk | ZON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 58 MB | 95 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mobsmile Ltd](https://appshunter.io/developer/1438857627) | [Esra Cavdar](https://appshunter.io/developer/1847347650) |

## What reviewers say

### Sunduk

[App page](https://appshunter.io/ios/app/sunduk/id6471366500)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ünite 4 | $1.99 | one-time |
| Ünite 3 | $1.99 | one-time |
| Ünite 2 | $1.99 | one-time |


### ZON

[App page](https://appshunter.io/ios/app/zon-word-learning/id6754559407)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Yearly | $9.99 | per year |


## Frequently asked questions

### Is Sunduk free?

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

### Is ZON free?

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

### Do Sunduk or ZON have ads?

ZON shows ads; Sunduk does not.

### Which is updated more often, Sunduk or ZON?

Sunduk ships an update every 4 months, and ZON every 5 days. Most recently, Sunduk was updated on November 4, 2026 and ZON on November 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.*