Comparison

Design Patterns Illustrated vs LeetCode

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

Head to head
About

Design Patterns Illustrated

Features
Read full description

1. Illustrated Design Patterns Visual learners rejoice! Each design pattern is accompanied by intuitive, full - color diagrams that illustrate core concepts.These visuals help bridge the gap between theory and implementation, making the patterns easier to understand and apply in real - world scenarios. 2. Comprehensive Pattern Library Access a complete library of the most essential design patterns, including: - Creational Patterns (e.g., Singleton, Factory) - Structural Patterns (e.g., Adapter, Composite) - Behavioral Patterns (e.g., Observer, Strategy) Each pattern comes with a detailed explanation of its use cases, pros and cons, and best practices. 3. Real - World Code Examples Learn how to implement design patterns with hands - on examples in multiple programming languages like Swift, Java, Python, and C#.Each pattern features downloadable, real - world code snippets to demonstrate how they are used in actual applications. 4. Interactive Quizzes & Challenges coming soon in the in-app purchase Test your knowledge with interactive quizzes after each pattern.Solve coding challenges to reinforce your understanding and earn achievements as you progress.This gamified approach ensures you stay engaged while learning. 5. Dark Mode & Custom Themes Customize your learning environment with Dark Mode or choose from a variety of themes to suit your preferences. 6. Offline Access No internet ? No problem! Save your favorite design patterns and examples for offline access, so you can continue learning on the go, even without connectivity.

About

LeetCode

Practice coding challenges and prepare for technical interviews on the go. Discover company-specific questions, manage your practice lists, and track your progress. Stay updated with contests and daily quests to improve your skills.

Highlights
  • Search and discover company questions
  • Practice coding challenges
  • Manage practice lists
  • Track personal progress
  • Contest registration and calendar sync
  • Daily challenges and quests
Features
Read full description

One LeetCode a day keeps your reasoning in play. Introducing LeetCode for iOS and iPadOS. Enjoy LeetCoding right at your fingertips — jump in for quick practice, browse your collections, and stay on top of important events and progress. With LeetCode in the palm of your hand, you can easily: • Search and discover the latest company questions. • View and quickly practice your favorite challenges right in the palm of your hand. • Manage your lists or add to your wishlist to practice later. • Keep track of your personal progress with a rich profile view and widgets. • Stay notified and keep your streak alive — level up with new challenges and quests every day. • Register for contests and sync them to your calendar. Live Activities keep you updated on contest progress — so you never miss a moment. • And more content and features coming every month… Terms of Services: https://leetcode.com/terms/ Privacy Policy: https://leetcode.com/privacy/

Screenshots

Design Patterns Illustrated4 screens
LeetCode4 screens

Verdict

The call

The clearest difference is in-app purchases: Design Patterns Illustrated at none against LeetCode's 2. On price, ads, device support and iOS requirement 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. LeetCode sells 2 in-app purchases, starting at $35.00 per month. Design Patterns Illustrated asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Design Patterns Illustrated versus LeetCode: the parameters behind the verdict, then further details
ParameterDesign Patterns IllustratedLeetCode
PriceFreeFree
Rating—4.8 (611 ratings) — better
Positive reviews—44.2% of reviews
Number of ratings—611 — better
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Ad-supported
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.616.0 — better
Further details — not scored
Size8 MB110 MB
Age rating4+4+
DeveloperApps Foundry Inc.LeetCode

In-app purchases

None

Design Patterns Illustrated

No in-app purchases

2 purchases

LeetCode

Subscriptions2
  • LeetCode Premium Monthly$35.001 Month
  • LeetCode Premium Yearly$159.001 Year

Questions

Is Design Patterns Illustrated free?
Design Patterns Illustrated is free to download, with no in-app purchases.
Is LeetCode free?
LeetCode is free to download, with in-app purchases available.
Do Design Patterns Illustrated or LeetCode have ads?
Neither Design Patterns Illustrated nor LeetCode shows ads.

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