# Learn Java Language vs Compendium Lab

The clearest difference is update cadence: Compendium Lab at every 4 weeks against Learn Java Language's every 16 months. Learn Java Language's advantage is iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Learn Java Language sells 1 one-off in-app purchase and Compendium Lab sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Learn Java Language ships an update every 16 months, Compendium Lab every 4 weeks. The most recent releases landed on September 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Learn Java Language | Compendium Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 4 weeks** |
| Size | 28 MB | 106 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ghumman Tech LLC](https://appshunter.io/developer/1671347750) | [Byoungho Kim](https://appshunter.io/developer/1888452963) |

## What reviewers say

### Learn Java Language

[App page](https://appshunter.io/ios/app/learn-java-language/id6446465238)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $9.99 | one-time |


### Compendium Lab

[App page](https://appshunter.io/ios/app/compendium-lab-math-and-ai/id6791996424)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compendium Lab Pro | $5.99 | one-time |


## Frequently asked questions

### Is Learn Java Language free?

Learn Java Language is free to download, with in-app purchases available.

### Is Compendium Lab free?

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

### Do Learn Java Language or Compendium Lab have ads?

Neither Learn Java Language nor Compendium Lab shows ads.

### Which is updated more often, Learn Java Language or Compendium Lab?

Learn Java Language ships an update every 16 months, and Compendium Lab every 4 weeks. Most recently, Learn Java Language was updated on September 20, 2026 and Compendium Lab on October 16, 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.*