# Optogenetics vs JS.Notebook

The clearest difference is update cadence: Optogenetics at every 5 months against JS.Notebook's every 50 months. JS.Notebook's advantage is iOS requirement (14.0 vs 17.0). 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.

Optogenetics ships an update every 5 months, JS.Notebook every 50 months. The most recent releases landed on October 17, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Optogenetics | JS.Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/jsnotebook/id1470144639/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 50 months |
| Monetization | — | Free |
| Size | 365 MB | 19 MB |
| Requires iOS | 17.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Popneuron Ltd.](https://appshunter.io/developer/569968720) | [Zijie Deng](https://appshunter.io/developer/1070117038) |

## What reviewers say

### Optogenetics

[App page](https://appshunter.io/ios/app/optogenetics/id570438151)

**Features:** macOS Compatibility

**In-app purchases:** none


### JS.Notebook

[App page](https://appshunter.io/ios/app/jsnotebook/id1470144639)

Build, test, and run your JavaScript code directly on your iOS device. This utility allows you to execute scripts in widgets and even use your device as a host for computer browser code execution.

**Highlights:** Build JavaScript code, Test code at runtime, Run code in widgets, Use device as code host, Code execution in computer browser

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Optogenetics free?

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

### Is JS.Notebook free?

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

### Do Optogenetics or JS.Notebook have ads?

Neither Optogenetics nor JS.Notebook shows ads.

### Which is updated more often, Optogenetics or JS.Notebook?

Optogenetics ships an update every 5 months, and JS.Notebook every 50 months. Most recently, Optogenetics was updated on October 17, 2026 and JS.Notebook on October 3, 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.*