# Kotlin Recipes: Code & SQL — Runnable Kotlin cheat sheet

> Runnable Kotlin code examples and SQL queries for developers. (iPhone/iPad app by Fedor Obraztsov.)

- Source: https://appshunter.io/ios/app/kotlin-recipes-code-and-sql/id1459431509 (this page in markdown: same URL + `.md`)
- Developer: [Fedor Obraztsov](https://appshunter.io/developer/1012115119)
- Category: Developer Tools, Education
- Price: Free with in-app purchases
- Rating: 4.50/5 from 8 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English, Arabic, French (France), German (Germany), Hebrew, Indonesian, Italian, Japanese, Korean, Brazilian Portuguese and 5 more
- Released: 2019-04-11
- Data updated: 2026-10-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/kotlin-recipes-code-and-sql/id1459431509/reviews.md

## What is Kotlin Recipes?

Tap Run and the real output appears right under the code, so you know what it does before it goes into your project. No Kotlin to install, no IDE, no setup, no account.

390+ short examples, one task each. Over 95% run on Kotlin 2.4.

You know what you need, but not the exact syntax:
• How do I fall back to a default value when a variable is null?
• How do I return two values from a function?
• How do I merge two maps?
Each has a working example here.

• 24 sections, including strings and dates, collections, nullable types, classes and interfaces, enums, generics, extension functions, lambdas, exception handling, regular expressions, multithreading, files, JSON and XML, algorithms, and design patterns.
• What changed from Kotlin 1.4 to 2.0, with before-and-after code: value classes, sealed interfaces, data objects and the improved smart casts in Kotlin 2.0.
• Reference, 320+ entries: keywords and standard library functions for strings, collections, files, and coroutines. Tap a word in the code to look it up.
• 200+ SQL queries: JOIN, GROUP BY, subqueries, window functions; more than half run on a practice database.
• Search looks inside the code: type joinToString to find every example that uses it.
• Edit an example and run your version, or write your own.
• Works on iPhone, iPad, and Mac.
• Everything except running code works offline.

Free version: 210+ Kotlin examples and 120+ SQL queries, the full reference, and 12 runs and 12 edits a day (Kotlin and SQL runs share one limit). Full version: all examples and queries, unlimited edits and examples of your own, and up to 30 Kotlin and 80 SQL runs a day. One-time purchase, no subscription.

Built by a developer for developers. The project behind it has been in active development since 2015.

## Key features

- Runnable Kotlin code examples
- SQL query examples
- Code editor and runner
- Offline reference
- Searchable code snippets
- Kotlin 2.0 changes

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Оperations with example | $0.99 | one-time |
| Unlock the paid topics | $0.99 | one-time |
| Kotlin Samples | $0.99 | one-time |
| SQL queries | $0.99 | one-time |
| Full version | $2.99 | one-time |


## Is Kotlin Recipes safe?

Not enough ratings yet to assess Kotlin Recipes.

## Is Kotlin Recipes legit?

Kotlin Recipes: Code & SQL appears to be a legitimate app. The AppsHunter Legitimacy Score for Kotlin Recipes is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/kotlin-recipes-code-and-sql/id1459431509/reviews.md

### 5/5 — Great to help beginners!

*2022-02-02*

I ran across it by accident and I am a beginner in Kotlin.  I find it very helpful, especially when I do the project Google Developer have me do in Android Studio.

**Developer response:** Thank you very much for your feedback 👍

### 5/5 — Хорошее приложение

*2021-08-07*

Полезно бывает залезть туда и почитать что-то новое. Не жалею о том, что заплатил за полную версию

**Developer response:** Спасибо большое 🤝

### 5/5 — it's good for beginners

*2021-05-19*

cool

**Developer response:** Thanks 🤝

### 5/5 — great reference and guide

*2021-05-17*

quality layout and reference guide. worth the meager cost

**Developer response:** Thanks for your feedback 🤝

### 5/5 — Пожелания

*2020-09-06*

Отличное приложение

**Developer response:** Спасибо за отзыв!

## Frequently asked questions about Kotlin Recipes

### What is Kotlin Recipes?

Kotlin Recipes is a mobile application designed to provide developers with runnable code examples for Kotlin and SQL queries. It acts as a quick reference and testing tool, allowing users to see code output instantly without needing a local setup.

### Does Kotlin Recipes have ads?

No, Kotlin Recipes does not contain advertisements. The app is free to download and use, with an optional one-time purchase for full access to all features and unlimited usage.

### What are the limitations of the free version of Kotlin Recipes?

The free version of Kotlin Recipes offers over 210 Kotlin examples and 120 SQL queries, along with the full reference. It limits users to 12 Kotlin and 12 SQL runs per day, and 12 edits per day, sharing a single limit between Kotlin and SQL runs.

### How does the full version of Kotlin Recipes differ from the free version?

The full version of Kotlin Recipes unlocks all examples and queries, provides unlimited edits and the ability to add your own examples, and increases daily run limits to 30 for Kotlin and 80 for SQL. This is a one-time purchase with no subscription.

### What Kotlin versions does Kotlin Recipes support?

Over 95% of the Kotlin examples in Kotlin Recipes run on Kotlin 2.4. The app also details changes from Kotlin 1.4 to 2.0, including new features like value classes and sealed interfaces.

### Can I use Kotlin Recipes offline?

Yes, most features of Kotlin Recipes work offline, including the reference, code examples, and SQL queries. Only the execution of code requires an active internet connection.

### What kind of SQL queries are included in Kotlin Recipes?

Kotlin Recipes includes over 200 SQL queries covering various operations such as JOIN, GROUP BY, subqueries, and window functions. More than half of these queries are designed to run on a practice database included within the app.

### What platforms is Kotlin Recipes available on?

Kotlin Recipes is available on iPhone, iPad, and Mac devices, allowing developers to access code examples and run them across their Apple ecosystem.

## Version history (last 5 releases)

### 4.10 — 2026-10-28

• Run code right in the app: tap Run and the real Kotlin 2.4 output appears under the example. You can also edit an example and run your version.
• Kotlin keyword and function reference with 320+ entries. Tap a word in the code to look it up.
• New section: what changed from Kotlin 1.4 to 2.0, with before-and-after code.
• Improved support for foldable phones and large screens.

### 3.00 — 2025-07-16

Bug fixes and performance improvements.

### 2.9 — 2024-11-05

Bug fixes and performance improvements.
The examples have been updated to Kotlin 2.0.21

### 2.8 — 2023-09-12

This update includes bug fixes and performance improvements.

### 2.6 — 2023-02-15

This update includes bug fixes and performance improvements.

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## More apps by Fedor Obraztsov

- [Code Recipes](https://appshunter.io/ios/app/code-recipes/id1012115120)
- [Code Recipes Pro](https://appshunter.io/ios/app/code-recipes-pro/id1061486140)
- [Java Recipes](https://appshunter.io/ios/app/java-recipes/id1180812403)
- [Python Recipes: Code & SQL](https://appshunter.io/ios/app/python-recipes-code-and-sql/id1180825853)
- [1С Рецепты](https://appshunter.io/ios/app/1/id1245968861)
- [C# Recipes](https://appshunter.io/ios/app/c-recipes/id1370674702)

All apps by Fedor Obraztsov: https://appshunter.io/developer/1012115119

## Related topics

[sql recipes](https://appshunter.io/ios/topics/sql-recipes)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-30.*