# Kotlin Programming vs TriStack

The clearest difference is price: Kotlin Programming at Free against TriStack's $5.99. TriStack's advantage is in-app purchases (none vs 1) and iOS requirement (15.1 vs 17.2). On update cadence, ads and device support there is nothing between them.

Kotlin Programming is free to download; TriStack costs $5.99 up front. Kotlin Programming sells 1 one-off in-app purchase. TriStack asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 9, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Kotlin Programming | TriStack |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/kotlin-programming/id6544798982/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 61 MB | 36 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Akshay Bhasme](https://appshunter.io/developer/1757403977) | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) |

## What reviewers say

### Kotlin Programming

[App page](https://appshunter.io/ios/app/kotlin-programming/id6544798982)

Learn Kotlin programming through interactive practice programs and a built-in code editor. Covers basics, OOP, functional programming, and Android development essentials. Includes a quiz game to test knowledge and track progress.

**Highlights:** 500+ interactive practice programs, Built-in code editor with real-time output, Learn Kotlin basics to advanced, Object-Oriented and Functional Programming modules, Android Development Essentials, Quiz game for knowledge testing, Offline access

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### TriStack

[App page](https://appshunter.io/ios/app/tristack/id6743567658)

**In-app purchases:** none


## Frequently asked questions

### Is Kotlin Programming free?

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

### Is TriStack free?

TriStack costs $5.99, with no in-app purchases.

### Do Kotlin Programming or TriStack have ads?

Neither Kotlin Programming nor TriStack shows ads.

### Which is updated more often, Kotlin Programming or TriStack?

Kotlin Programming ships an update every 2 months, and TriStack every 2 months. Most recently, Kotlin Programming was updated on September 9, 2026 and TriStack on September 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*