# E vs OZ viewer

The clearest difference is ads: OZ viewer at none against E's shown. OZ viewer also leads on update cadence (every 2 days vs every 11 days). E's advantage is iOS requirement (11.0 vs 13.4). On price, 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.

E ships an update every 11 days, OZ viewer every 2 days. The most recent releases landed on May 17, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | E | OZ viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 11 days | **Every 2 days** |
| Size | 857 MB | 12 MB |
| Requires iOS | **11.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [YONGGEUN LEE](https://appshunter.io/developer/1468414615) | [YLAB Earth](https://appshunter.io/developer/1777383384) |

## What reviewers say

### E

[App page](https://appshunter.io/ios/app/e-exhibition3/id6449340882)

**Features:** macOS Compatibility

**In-app purchases:** none


### OZ viewer

[App page](https://appshunter.io/ios/app/oz-viewer/id6737684535)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E free?

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

### Is OZ viewer free?

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

### Do E or OZ viewer have ads?

E shows ads; OZ viewer does not.

### Which is updated more often, E or OZ viewer?

E ships an update every 11 days, and OZ viewer every 2 days. Most recently, E was updated on May 17, 2026 and OZ viewer on May 19, 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.*