# Optical Simulator vs OptiLibrary

The clearest difference is update cadence: OptiLibrary at monthly against Optical Simulator's every 4 months. On price, ads, 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.

Optical Simulator ships an update every 4 months, OptiLibrary monthly. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Optical Simulator | OptiLibrary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 82 MB | 227 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Treeview Studio SAS](https://appshunter.io/developer/1171912639) | [Shanghai Ouzhiou Trading Co., Ltd.](https://appshunter.io/developer/1704953492) |

## What reviewers say

### Optical Simulator

[App page](https://appshunter.io/ios/app/optical-simulator/id1536399422)

**Features:** macOS Compatibility

**In-app purchases:** none


### OptiLibrary

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optical Simulator free?

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

### Is OptiLibrary free?

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

### Do Optical Simulator or OptiLibrary have ads?

Neither Optical Simulator nor OptiLibrary shows ads.

### Which is updated more often, Optical Simulator or OptiLibrary?

Optical Simulator ships an update every 4 months, and OptiLibrary monthly. Most recently, Optical Simulator was updated on September 10, 2026 and OptiLibrary on September 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*