Leaflet for Swift&Algorithm vs Eul
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
Read full descriptionHide full description
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.
Eul
This app offers an interactive SwiftUI learning experience with real-time code previews on Apple devices. It covers the latest SwiftUI features and serves as a comprehensive reference tool for developers.
- Interactive SwiftUI learning
- Real-time code previews
- Covers latest SwiftUI updates
- Comprehensive reference tool
- Cross-platform support (iOS, iPadOS, macOS)
- Powerful search functionality
Read full descriptionHide full description
Eul 是一款简洁、纯粹的 SwiftUI 教程 App,有以下独特之处: 1. 基于最新的 SwiftUI 构建,支持 iOS、iPadOS、macOS 多个平台,教程内容同步更新至最新的 SwiftUI。内容不仅保持最新,也非常全面细致,包括但不限于 SwiftUI、Swift、Concurrency、Combine 等。 2. 与书籍或网站的传统教程不同,Eul 率先提供了一种交互式的学习体验,读者看到的不仅是图文和代码,还能直接在苹果的设备上(iPhone、iPad、Mac)看到代码的真机运行效果。配合深入浅出的文章讲解,这有助于读者更快更好地理解和使用 SwiftUI。 示例附带的源码直接 copy 后就可以在 Xcode 中预览和运行,copy 的代码和示例背后的源码是完全一致的。 3. Eul 还提供了强大的搜索功能,它不仅是一本教程,还可以作为工具书供开发者随时查阅 SwiftUI 的相关知识及使用。 读者如有 iOS 开发经验,可直接开始学习。若是初学者,建议先去熟悉 Swift 语法。 笔者意在尽可能使用简洁明了的语言阐述 SwiftUI 的相关知识,使读者能快速掌握并在 iOS 开发中实践。读者若能从中获益,笔者深感欣慰。如有漏误之处,恳请斧正,不甚感激。 # 联系方式 Email:zzzwco@outlook.com Twitter:zzzwco
Screenshots
Verdict
The clearest difference is ratings volume: Leaflet for Swift&Algorithm at 297 against Eul's 4. Leaflet for Swift&Algorithm also leads on update cadence (every 6 days vs every 2 weeks). Eul's advantage is review sentiment (92% vs 71%) and rating (4.8 vs 4.6). On price, ads, in-app purchases and monetization model 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 Eul sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Eul holds the better App Store score, 4.8 against 4.6. That said, the two scores are not equally well evidenced: Leaflet for Swift&Algorithm has 297 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 71% of Leaflet for Swift&Algorithm's written reviews are positive against 92% of Eul's.
Leaflet for Swift&Algorithm ships an update every 6 days, Eul every 2 weeks. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.
| Parameter | Leaflet for Swift&Algorithm | Eul |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (297 ratings) | 4.8 (4 ratings) — better |
| Positive reviews | 71.4% of reviews | 92.3% of reviews — better |
| Number of ratings | 297 — better | 4 |
| Update frequency | Every 6 days — better | Every 2 weeks |
| 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 | 54 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | 雷 戴 | 科 曾 |
Customer experience
Leaflet for Swift&Algorithm
Eul
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
Show 6 moreShow fewer
- 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)
Show 19 moreShow fewer
- 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
Eul
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Leaflet for Swift&Algorithm
- Get Pro Version$0.99
Eul
- Pro$1.99
Questions
Is Leaflet for Swift&Algorithm free?
Is Eul free?
Which has better reviews, Leaflet for Swift&Algorithm or Eul?
Do Leaflet for Swift&Algorithm or Eul have ads?
Which is updated more often, Leaflet for Swift&Algorithm or Eul?
Other comparisons















