# OptiLibrary vs EyeScaler

The clearest difference is in-app purchases: OptiLibrary at none against EyeScaler's 1. OptiLibrary also leads on iOS requirement (11.0 vs 15.0). EyeScaler's advantage is update cadence (fortnightly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. EyeScaler sells 1 one-off in-app purchase. OptiLibrary asks for nothing beyond the download.

OptiLibrary ships an update monthly, EyeScaler fortnightly. Both last shipped on October 12, 2026.

## The numbers

| Metric | OptiLibrary | EyeScaler |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Size | 227 MB | 4 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Ouzhiou Trading Co., Ltd.](https://appshunter.io/developer/1704953492) | [建芳 马](https://appshunter.io/developer/1809381883) |

## What reviewers say

### OptiLibrary

[App page](https://appshunter.io/ios/app/optilibrary/id6463772966)

**Features:** macOS Compatibility

**In-app purchases:** none


### EyeScaler

[App page](https://appshunter.io/ios/app/eyescaler/id6754126877)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EyeScale Lifetime PRO | $2.99 | one-time |


## Frequently asked questions

### Is OptiLibrary free?

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

### Is EyeScaler free?

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

### Do OptiLibrary or EyeScaler have ads?

Neither OptiLibrary nor EyeScaler shows ads.

### Which is updated more often, OptiLibrary or EyeScaler?

OptiLibrary ships an update monthly, and EyeScaler fortnightly. Most recently, OptiLibrary was updated on October 12, 2026 and EyeScaler on October 12, 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.*