Leaflet for Swift&Algorithm vs Kotlin Recipes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Leaflet for Swift&Algorithm
This app offers comprehensive learning modules for Swift, SwiftUI, and Combine, alongside data structures and algorithms. It provides micro-classes, tutorials, code style guides, and practical examples to help users master programming concepts and develop efficient applications.
- Swift language tutorials
- SwiftUI and Combine development
- Data structure and algorithm learning
- Micro-classes for core concepts
- Code style guide
- Algorithm problem-solving examples
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Leaflet helps you learn Swift/SwiftUI and Data Structure/Algorithms better. Leaflet has four main functions: 【1】Algorithm Animation Visualization Through exquisite and intuitive animation demos, abstract algorithms and data structures are made visual — every step of execution is clearly visible. This is the core highlight of Leaflet. - Animation Demos: Carefully selected classic algorithms (sorting, searching, graph algorithms, dynamic programming, recursion, etc.) built with SwiftUI + Combine for smooth animations that make algorithm execution crystal clear. - Interactive Playback: Support play, pause, step forward / step backward, and adjustable playback speed — control your learning pace freely. - Data Structure Visualization: Arrays, linked lists, stacks, queues, trees, graphs and other data structures are presented graphically; insert, delete, and traverse operations are intuitive at a glance. - Synchronized Code View: Animation demos are displayed alongside the corresponding Swift source code, letting you learn code while watching the animation — more efficient learning. - Complexity Analysis: Visually shows the time / space complexity trends of algorithms, helping you build performance-analysis thinking. Learning algorithms is no longer dry code reading, but a vivid visual experience — every algorithm becomes something you can "see and touch". 【2】Swift Tutorial - Swift one-hour micro class, quickly master the core knowledge points of Swift grammar - Swift5 complete tutorial covering all language features from beginner to advanced - Swift Code Style Guide for writing more standardized code - Swift design pattern practice 【3】Swift + SwiftUI + Combine SwiftUI's declarative UI paired with Combine's functional reactive framework — simple to learn, high-performance, and reliable, enabling developers to quickly build elegant applications. 【4】Algorithm Solutions Curated representative algorithm problems implemented in Swift, covering data structures and algorithm analysis to help you master algorithm complexity and performance analysis. Part of the application is based on the open source protocol from the following open source libraries, Gratitude: https://github.com/raywenderlich/swift-algorithm-club , Algorithms and data structures in Swift, with explanations! https://github.com/andyRon/swift-algorithm-club-cn, swift-algorithm-club's translation. Learn algorithms and data structures using Swift.
Kotlin Recipes
Access a curated collection of ready-to-use code examples for Kotlin and SQL. Quickly find solutions to common programming tasks, prepare for exams and interviews, and learn with offline access to tested code snippets.
- Kotlin code recipes
- SQL code recipes
- Tested code examples
- Quick search functionality
- Offline access
- Exam and interview preparation
- Cross-platform iOS and macOS support
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• Learn programming with the best code recipes. • Kotlin: - How to get a substring? - How to declare a generalized method? - How to perform a database query? • SQL: - How to combine multiple tables in a single query? - How to sort the result of grouping data? - What types of data are there in SQL Server? • The best examples of code from books and specific internet resources are selected in the app. Finding the best solution on the internet can take hours of work. Ready-to-use and tested "recipes" for code are included in the app. • The app is a great tool for passing exams or preparing for interviews. It helps you study the typical tasks you might face. • One app for iOS and macOS. Buy once and use it on your phone, tablet, or computer. • Quick search of the correct example by code or name of topic. • All examples in the app are available offline. The app can be used when an internet connection is not available. • As a developer, I use this app when I need to quickly remember how to solve a given task in SQL or Kotlin. If you can help to translate the app into your language, please contact me by email. In the application, some examples are available for an additional fee (approximately 45%).
Screenshots
Verdict
The clearest difference is update cadence: Leaflet for Swift&Algorithm at every 8 days against Kotlin Recipes's every 3 months. Leaflet for Swift&Algorithm also leads on ratings volume (297 vs 8). Kotlin Recipes's advantage is review sentiment (100% vs 71%) and iOS requirement (16.0 vs 26.0). On price, rating, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Leaflet for Swift&Algorithm sells 1 one-off in-app purchase and Kotlin Recipes sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.6 for Leaflet for Swift&Algorithm against 4.5 for Kotlin Recipes. That said, the two scores are not equally well evidenced: Leaflet for Swift&Algorithm has 297 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 71% of Leaflet for Swift&Algorithm's written reviews are positive against 100% of Kotlin Recipes's.
Leaflet for Swift&Algorithm ships an update every 8 days, Kotlin Recipes every 3 months. The most recent releases landed on October 18, 2026 and October 13, 2026 respectively.
| Parameter | Leaflet for Swift&Algorithm | Kotlin Recipes |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (297 ratings) — better | 4.5 (8 ratings) |
| Positive reviews | 71.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 297 — better | 8 |
| Update frequency | Every 8 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 26.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 53 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | 雷 戴 | Fedor Obraztsov |
Customer experience
Leaflet for Swift&Algorithm
Kotlin Recipes
Bugs and requests
Leaflet for Swift&Algorithm
Reported bugs
11 issues- Solutions for problems are not loading
- App crashes on first load
- App crashes immediately on launch
- App crashes after first use and backgrounding
- Paid for pro user, but no answers for many questions
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- Navigation tabs become black in dark mode, not full dark mode
- Note editing removes indentation
- Problem tags inconsistent with actual solutions
- Label page freezes after continuous clicking
- Code formatting is messy in notes after saving
- Issues with membership verification across devices
Requested features
24 requests- Add more iOS technical upgrades
- Add filter options for algorithms (e.g., top 100, top 200)
- Allow users to write their own notes for algorithms
- Add JavaScript examples
- Allow users to suggest/edit explanations (wiki-like)
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- Add settings option with restore purchase based on user level
- Add account system for syncing notes across devices
- Add search functionality by keyword
- Add search functionality by problem number
- Add difficulty selection for tags
- Add time and space complexity for solutions
- Remember last viewed problem in company-categorized lists
- Add tab button for coding
- Add solution ideas/approaches
- Add comments to problems for beginners
- Add filter for marked as seen/unseen
- Add more languages for implementations
- Add PAT problem question bank
- Add landscape mode for tablets or code viewing
- Optimize responsive display for iPad Pro horizontal view
- Add Chinese language option
- Add more C++ solutions
- Add more solutions overall
- Optimize tag confirmation step
Kotlin Recipes
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Leaflet for Swift&Algorithm
- Get Pro Version$0.99
Kotlin Recipes
- Оperations with example$0.99
- Unlock the paid topics$0.99
- Kotlin Samples$0.99
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- SQL queries$0.99
- Full version$2.99
Questions
Is Leaflet for Swift&Algorithm free?
Is Kotlin Recipes free?
Which has better reviews, Leaflet for Swift&Algorithm or Kotlin Recipes?
Do Leaflet for Swift&Algorithm or Kotlin Recipes have ads?
Which is updated more often, Leaflet for Swift&Algorithm or Kotlin Recipes?
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