# SwipeJS vs Learn Kotlin | KotlinPad

The clearest difference is price: SwipeJS at Free against Learn Kotlin | KotlinPad's $2.99. SwipeJS also leads on update cadence (every 3 days vs every 12 months). Learn Kotlin | KotlinPad's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

SwipeJS is free to download; Learn Kotlin | KotlinPad costs $2.99 up front. SwipeJS sells 1 one-off in-app purchase. Learn Kotlin | KotlinPad asks for nothing beyond the download.

SwipeJS ships an update every 3 days, Learn Kotlin | KotlinPad every 12 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SwipeJS | Learn Kotlin | KotlinPad |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/learn-kotlin-kotlinpad/id6754602613/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 12 months |
| Monetization | — | Paid |
| Size | 26 MB | 73 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [GRIGORI UKRAINSKI](https://appshunter.io/developer/1805133493) | [Muhammad Umair](https://appshunter.io/developer/1696049320) |

## What reviewers say

### SwipeJS

[App page](https://appshunter.io/ios/app/swipejs-learn-javascript/id6743933557)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| React.js cards | $3.99 | one-time |


### Learn Kotlin | KotlinPad

[App page](https://appshunter.io/ios/app/learn-kotlin-kotlinpad/id6754602613)

Master the Kotlin programming language with interactive lessons, progress tracking, and quizzes. This app offers a structured learning path for beginners and experienced developers alike, with a clean interface and integrated help resources.

**Highlights:** Interactive lessons, Progress tracking, Search functionality, Help Center integration, Quizzes and challenges, Personalized learning path, Visual progress indicators

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

**In-app purchases:** none


## Frequently asked questions

### Is SwipeJS free?

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

### Is Learn Kotlin | KotlinPad free?

Learn Kotlin | KotlinPad costs $2.99, with no in-app purchases.

### Do SwipeJS or Learn Kotlin | KotlinPad have ads?

SwipeJS shows ads; Learn Kotlin | KotlinPad does not.

### Which is updated more often, SwipeJS or Learn Kotlin | KotlinPad?

SwipeJS ships an update every 3 days, and Learn Kotlin | KotlinPad every 12 months. Most recently, SwipeJS was updated on October 25, 2026 and Learn Kotlin | KotlinPad on October 24, 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.*