# JS Master vs Learning transistor

The clearest difference is in-app purchases: JS Master at none against Learning transistor's 1. JS Master also leads on device support (4 vs 1) and iOS requirement (12.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Learning transistor sells 1 one-off in-app purchase. JS Master asks for nothing beyond the download.

## The numbers

| Metric | JS Master | Learning transistor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 33 MB | 1 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Taalaybek Aslanbek uulu](https://appshunter.io/developer/1785399043) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### JS Master

[App page](https://appshunter.io/ios/app/js-master/id6736955510)

**In-app purchases:** none


### Learning transistor

[App page](https://appshunter.io/ios/app/learning-transistor/id6792466363)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $4.99 | one-time |


## Frequently asked questions

### Is JS Master free?

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

### Is Learning transistor free?

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

### Do JS Master or Learning transistor have ads?

Neither JS Master nor Learning transistor shows ads.

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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.*