# Java to Kotlin vs Learn Kotlin

The clearest difference is in-app purchases: Java to Kotlin at none against Learn Kotlin's 4. Java to Kotlin also leads on ads (none vs shown) and iOS requirement (13.4 vs 15.1). On price and device support there is nothing between them.

Both are free to download. Learn Kotlin sells 4 in-app purchases, starting at $4.99 per 7 days. Java to Kotlin asks for nothing beyond the download.

## The numbers

| Metric | Java to Kotlin | Learn Kotlin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 3 weeks |
| Size | 2 MB | 66 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Little World](https://appshunter.io/developer/1521130475) | [MEHMET CANKER (TR)](https://appshunter.io/developer/1565350155) |

## What reviewers say

### Java to Kotlin

[App page](https://appshunter.io/ios/app/java-to-kotlin/id1521130473)

**Features:** macOS Compatibility

**In-app purchases:** none


### Learn Kotlin

[App page](https://appshunter.io/ios/app/learn-kotlin-android-app-dev/id6739499371)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $6.99 | per month |
| Yearly Subscription | $24.99 | per year |
| Lifetime Subscription | $59.99 | one-time |


## Frequently asked questions

### Is Java to Kotlin free?

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

### Is Learn Kotlin free?

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

### Do Java to Kotlin or Learn Kotlin have ads?

Learn Kotlin shows ads; Java to Kotlin does not.

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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.*