# AOB Mobile vs Kotlin Tutorial

The clearest difference is in-app purchases: AOB Mobile at none against Kotlin Tutorial's 1. AOB Mobile also leads on ads (none vs shown). Kotlin Tutorial's advantage is update cadence (every 4 weeks vs every 8 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Kotlin Tutorial sells 1 in-app purchase, starting at $0.99 per month. AOB Mobile asks for nothing beyond the download.

AOB Mobile ships an update every 8 months, Kotlin Tutorial every 4 weeks. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | AOB Mobile | Kotlin Tutorial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/kotlin-tutorial/id6479207184/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 months | **Every 4 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 18 MB | 29 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Binus Media & Publishing](https://appshunter.io/developer/792575438) | [Jayotsanaben Hadiya](https://appshunter.io/developer/1662594833) |

## What reviewers say

### AOB Mobile

[App page](https://appshunter.io/ios/app/aob-mobile/id1576196577)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kotlin Tutorial

[App page](https://appshunter.io/ios/app/kotlin-tutorial/id6479207184)

Learn Kotlin programming with this app, covering basic to advanced concepts. It includes practice programs, interview questions, and an online compiler for hands-on learning. Ideal for beginners and professionals.

**Highlights:** Basic and advanced Kotlin concepts, Practice programs, Interview questions and answers, Online Kotlin compiler, 50+ Kotlin program examples

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Access | $0.99 | per month |


## Frequently asked questions

### Is AOB Mobile free?

AOB Mobile is free to download, with no in-app purchases.

### Is Kotlin Tutorial free?

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

### Do AOB Mobile or Kotlin Tutorial have ads?

Kotlin Tutorial shows ads; AOB Mobile does not.

### Which is updated more often, AOB Mobile or Kotlin Tutorial?

AOB Mobile ships an update every 8 months, and Kotlin Tutorial every 4 weeks. Most recently, AOB Mobile was updated on October 10, 2026 and Kotlin Tutorial on October 15, 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.*