# Learn Underscore.js Offline vs Learn Shell Scripting Pro

The clearest difference is update cadence: Learn Shell Scripting Pro at every 2 months against Learn Underscore.js Offline's every 21 months. Learn Underscore.js Offline's advantage is price ($1.99 vs $4.99) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Learn Underscore.js Offline costs $1.99 and Learn Shell Scripting Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Learn Underscore.js Offline ships an update every 21 months, Learn Shell Scripting Pro every 2 months. The most recent releases landed on November 11, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Learn Underscore.js Offline | Learn Shell Scripting Pro |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 2 months** |
| Size | 38 MB | 12 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Muhammad Mubeen](https://appshunter.io/developer/1553722821) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Learn Underscore.js Offline

[App page](https://appshunter.io/ios/app/learn-underscorejs-offline/id6738279319)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Learn Shell Scripting Pro

[App page](https://appshunter.io/ios/app/learn-shell-scripting-pro/id6747474775)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Learn Underscore.js Offline free?

Learn Underscore.js Offline costs $1.99, with no in-app purchases.

### Is Learn Shell Scripting Pro free?

Learn Shell Scripting Pro costs $4.99, with no in-app purchases.

### Do Learn Underscore.js Offline or Learn Shell Scripting Pro have ads?

Neither Learn Underscore.js Offline nor Learn Shell Scripting Pro shows ads.

### Which is updated more often, Learn Underscore.js Offline or Learn Shell Scripting Pro?

Learn Underscore.js Offline ships an update every 21 months, and Learn Shell Scripting Pro every 2 months. Most recently, Learn Underscore.js Offline was updated on November 11, 2026 and Learn Shell Scripting Pro on November 8, 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.*