Comparison

Leaflet for Swift&Algorithm vs Java面试(Voids)

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Swift language tutorials
  • SwiftUI and Combine development
  • Data structure and algorithm learning
  • Micro-classes for core concepts
  • Code style guide
  • Algorithm problem-solving examples
Features
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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.

About

Java面试(Voids)

This app provides a comprehensive question bank for Java technical interviews, covering a wide range of topics. It aims to help users identify knowledge gaps and prepare effectively for interviews through extensive practice. The content includes detailed explanations and is designed to assist developers in mastering interview essentials.

Highlights
  • Extensive Java interview question bank
  • Covers JVM, Spring, Microservices, Databases, and more
  • Detailed explanations and visual aids
  • Helps identify knowledge gaps
  • Practice for technical interviews
Features
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技术面试在一定技巧之基础上更多的是八股,需要大量练习后才能脱口而出,融会贯通后才能将知识点/考点结合业务与产品自然输出。 Java整个体系知识非常丰富,无法面面俱到是正常的知识状态,此应用主要作用是查漏补缺,临时抱佛脚总比裸考强。 取名"Voids"来源于Java工程中的主函数`public static void main(String[] args)`,技术面在国内越来越八股化,工作大部分都是面对搜索引擎编程,只能说熟练应试也是技术/工作能力之一。 题库拥有5000+精选面试题,图文并茂,包括且不限于: Java、JVM、Spring、SpringMVC、SpringBoot、SpringCloud、SpringCloud Alibaba、微服务、MySQL、MyBatis、Redis、Kafka、RabbitMQ、Memcached、ElasticSearch、Dubbo、ZooKeeper、Linux、Docker等等

Screenshots

Leaflet for Swift&Algorithm4 screens
Java面试(Voids)4 screens

Verdict

The call

The clearest difference is rating: Java面试(Voids) at 5.0 against Leaflet for Swift&Algorithm's 4.6. Java面试(Voids) also leads on iOS requirement (17.0 vs 26.0). Leaflet for Swift&Algorithm's advantage is ratings volume (297 vs 5). On price, review sentiment, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Leaflet for Swift&Algorithm sells 1 one-off in-app purchase and Java面试(Voids) sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Java面试(Voids) holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Leaflet for Swift&Algorithm has 297 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 71% and 71% positive.

UpkeepUpdate frequency

Leaflet for Swift&Algorithm ships an update every 6 days, Java面试(Voids) every 10 days. The most recent releases landed on September 21, 2026 and September 14, 2026 respectively.

Scorecard3 real differences · 7 level
Leaflet for Swift&Algorithm versus Java面试(Voids): the parameters behind the verdict, then further details
ParameterLeaflet for Swift&AlgorithmJava面试(Voids)
PriceFreeFree
Rating4.6 (297 ratings)5.0 (5 ratings) — better
Positive reviews71.4% of reviews71.4% of reviews
Number of ratings297 — better5
Update frequencyEvery 6 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS26.017.0 — better
Further details — not scored
Size54 MB82 MB
Age rating4+4+
Developer雷 戴雷 戴

Customer experience

Leaflet for Swift&Algorithm

All ratings297 ratings
Positive89.2%
Neutral3.4%
Negative7.4%
Written reviews42 reviews
Positive71.4%
Neutral7.1%
Negative21.4%

Java面试(Voids)

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive71.4%
Neutral28.6%
Negative0.0%

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 more
  • 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 more
  • 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

Java面试(Voids)

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Leaflet for Swift&Algorithm

One-time1
  • Get Pro Version$0.99
1 purchases

Java面试(Voids)

One-time1
  • 升级为Pro$0.99

Questions

Is Leaflet for Swift&Algorithm free?
Leaflet for Swift&Algorithm is free to download, with in-app purchases available.
Is Java面试(Voids) free?
Java面试(Voids) is free to download, with in-app purchases available.
Which has better reviews, Leaflet for Swift&Algorithm or Java面试(Voids)?
Java面试(Voids) is rated higher. Leaflet for Swift&Algorithm averages 4.6 out of 5 from 297 ratings, while Java面试(Voids) averages 5.0 from 5 ratings.
Do Leaflet for Swift&Algorithm or Java面试(Voids) have ads?
Neither Leaflet for Swift&Algorithm nor Java面试(Voids) shows ads.
Which is updated more often, Leaflet for Swift&Algorithm or Java面试(Voids)?
Leaflet for Swift&Algorithm ships an update every 6 days, and Java面试(Voids) every 10 days. Most recently, Leaflet for Swift&Algorithm was updated on September 21, 2026 and Java面试(Voids) on September 14, 2026.

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