# Kotlin Tutorial vs BillionApp

The clearest difference is in-app purchases: BillionApp at none against Kotlin Tutorial's 1. BillionApp also leads on ads (none vs shown). Kotlin Tutorial's advantage is iOS requirement (12.0 vs 15.1). On price and device support there is nothing between them.

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

## The numbers

| Metric | Kotlin Tutorial | BillionApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/kotlin-tutorial/id6479207184/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 46 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jayotsanaben Hadiya](https://appshunter.io/developer/1662594833) | [The Members](https://appshunter.io/developer/1653824858) |

## What reviewers say

### 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 |


### BillionApp

[App page](https://appshunter.io/ios/app/billionapp/id6748040701)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kotlin Tutorial free?

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

### Is BillionApp free?

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

### Do Kotlin Tutorial or BillionApp have ads?

Kotlin Tutorial shows ads; BillionApp 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.*