# Kotlin Compiler vs StartToSwiftUI

The clearest difference is update cadence: StartToSwiftUI at every 5 days against Kotlin Compiler's every 6 months. Kotlin Compiler's advantage is iOS requirement (12.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Kotlin Compiler ships an update every 6 months, StartToSwiftUI every 5 days. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Kotlin Compiler | StartToSwiftUI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 5 days** |
| Size | 28 MB | 18 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [OnePercent](https://appshunter.io/developer/1536020418) | [Andrey Efimov](https://appshunter.io/developer/1856334634) |

## What reviewers say

### Kotlin Compiler

[App page](https://appshunter.io/ios/app/kotlin-compiler-run-kt-code/id1554903545)

**Features:** macOS Compatibility

**In-app purchases:** none


### StartToSwiftUI

[App page](https://appshunter.io/ios/app/starttoswiftui/id6755787606)

**In-app purchases:** none


## Frequently asked questions

### Is Kotlin Compiler free?

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

### Is StartToSwiftUI free?

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

### Do Kotlin Compiler or StartToSwiftUI have ads?

Neither Kotlin Compiler nor StartToSwiftUI shows ads.

### Which is updated more often, Kotlin Compiler or StartToSwiftUI?

Kotlin Compiler ships an update every 6 months, and StartToSwiftUI every 5 days. Most recently, Kotlin Compiler was updated on September 14, 2026 and StartToSwiftUI on September 21, 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.*