Comparison

Adaptivity (B) vs Leaflet for Swift&Algorithm

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

Head to head
About

Adaptivity (B)

Visualize how app layouts appear on various devices and adapt to different settings like orientation, multitasking, and text size changes. This free version offers essential tools for developers and designers to preview their work.

Highlights
  • Visualize layout sizes
  • Display sizes in points or pixels
  • Toggle status bar visibility
  • Support for iPad multitasking
  • Dark appearance support
  • Force right-to-left layout
  • Handoff actions
Features
Read full description

Adaptivity is an invaluable tool for developers and designers. Use it to visualize how Size Classes and margins for layout, readable content and the safe area look on real devices and how they change with respect to orientation, iPad multitasking and Dynamic Type size changes. This free version has reduced features. TESTIMONIALS • “Adaptivity is not just highly recommended – it’s essential” — Paul Hudson, Hacking With Swift article “8 essential apps for iOS developers”, 30th March 2020. • “It's a very, very good tool as a reference for both developers and designers” — Gui Rambo, Stacktrace podcast episode #77, 1st April 2020. • “I'm not trying to spend your money, but to me this is a no-brainer” — Sean Allen YouTube video “Indie Dev Apps”, 12th April 2020. MAIN FEATURES • Visualize sizes for full view, layout margins, readable content guide and safe area layout guide. • Sizes displayed in points or pixels. • Regular or large navigation bar titles. • Toggle status bar and navigation bar/toolbar/tab bar visibility. • Activity View Controller for sharing a snapshot image of each view. • iPad multitasking (see note). • Dark appearance support (requires iOS/iPadOS 13 or later). • Setting to force right-to-left layout. • Handoff actions from Adaptivity (B) on one device to Adaptivity (A) on another. OTHER VIEWS • Popover, Form/Page Sheet, Full Screen and Automatic modal presentations. • Customise Sheet Presentations on iOS/iPadOS 15 or later. • Tab Bar Controller • Class style Split View Controller. • Dynamic Type styles for the current Content Size Category. The full version of the app, Adaptivity (A), includes many more features: • Table View Controller. • Double and triple column style Split View Controllers (requires iOS/iPadOS 14 or later). • Keyboard Dodging and Custom Keyboard. • Safe Area Layout Guide. • Explore Pointer Interactions (requires iPadOS 13.4 or later and a trackpad or mouse). • Explore System Colors. • Explore System Fonts. • Explore System Images (requires iOS/iPadOS 13 or later). Choose which SF Symbols data set to view, configure rendering modes and much more. • Explore System Materials (requires iOS/iPadOS 13 or later). • Keyboard shortcuts. • Keyboard navigation (requires iPadOS 15 or later). • Home Screen Quick Actions (requires iOS/iPadOS 13 or later). • Siri shortcut with custom response UI. • Handoff support. • External display support. • Pre- and post-iOS 14 style Widgets to show layout. • iOS 14 style Widgets to show random System Images. • iOS 14 style Widgets to show Dynamic Type text styles. • iOS 16 lock screen Widgets to show layout. • iOS 16 lock screen Widgets to show random System Images. • Notification Content Extension. • Watch App. • iMessage App. Note: Adaptivity (A) supports multiple windows on iPadOS 13 or later. On earlier iOS versions, Adaptivity (A) and (B) must be downloaded to run Adaptivity twice using iPad multitasking. Adaptivity (A) is a universal purchase and includes a Mac Catalyst version of the app. Buying one allows the other to be downloaded at no extra cost using the same Apple ID. Adaptivity (C) has the same reduced features as Adaptivity (B) but only supports iPhone. Use it to visualize how an iPhone‑only app appears on iPad. For more information see https://hacknicity.com/adaptivity

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
Read 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.

Screenshots

Adaptivity (B)4 screens
Leaflet for Swift&Algorithm4 screens

Verdict

The call

The clearest difference is in-app purchases: Adaptivity (B) at none against Leaflet for Swift&Algorithm's 1. Adaptivity (B) also leads on review sentiment (100% vs 71%) and rating (5.0 vs 4.6). Leaflet for Swift&Algorithm's advantage is update cadence (every 8 days vs every 2 months) and ratings volume (297 vs 9). On price, ads and device support 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. Adaptivity (B) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Adaptivity (B) 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 9, so its average is the more settled of the two. Written reviews point the same way: 100% of Adaptivity (B)'s written reviews are positive against 71% of Leaflet for Swift&Algorithm's.

UpkeepUpdate frequency

Adaptivity (B) ships an update every 2 months, Leaflet for Swift&Algorithm every 8 days. The most recent releases landed on September 22, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 3 level
Adaptivity (B) versus Leaflet for Swift&Algorithm: the parameters behind the verdict, then further details
ParameterAdaptivity (B)Leaflet for Swift&Algorithm
PriceFreeFree
Rating5.0 (9 ratings) — better4.6 (297 ratings)
Positive reviews100.0% of reviews — better71.4% of reviews
Number of ratings9297 — better
Update frequencyEvery 2 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better26.0
Further details — not scored
Size12 MB53 MB
Age rating4+4+
DeveloperGeoff Hackworth雷 戴

Customer experience

Adaptivity (B)

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Leaflet for Swift&Algorithm

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

Bugs and requests

Adaptivity (B)

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Adaptivity (B)

No in-app purchases

1 purchases

Leaflet for Swift&Algorithm

One-time1
  • Get Pro Version$0.99

Questions

Is Adaptivity (B) free?
Adaptivity (B) is free to download, with no in-app purchases.
Is Leaflet for Swift&Algorithm free?
Leaflet for Swift&Algorithm is free to download, with in-app purchases available.
Which has better reviews, Adaptivity (B) or Leaflet for Swift&Algorithm?
Adaptivity (B) is rated higher. Adaptivity (B) averages 5.0 out of 5 from 9 ratings, while Leaflet for Swift&Algorithm averages 4.6 from 297 ratings.
Do Adaptivity (B) or Leaflet for Swift&Algorithm have ads?
Neither Adaptivity (B) nor Leaflet for Swift&Algorithm shows ads.
Which is updated more often, Adaptivity (B) or Leaflet for Swift&Algorithm?
Adaptivity (B) ships an update every 2 months, and Leaflet for Swift&Algorithm every 8 days. Most recently, Adaptivity (B) was updated on September 22, 2026 and Leaflet for Swift&Algorithm on October 14, 2026.

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