Best Diagram Apps & Games

248+ iOS apps & games curated and reviewed

4.3 avg rating
20 free apps & games
Updated October 2026

Out of 248+ diagram apps and games on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Diagram Apps & Games (October 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1LucidchartLucidchartFree4.6★ (5.3K)YesNoOct 2026
2CarminCarminFree4.3★ (223)YesYesSep 2026
3Simple DiagramSimple DiagramFree—YesNoOct 2026
4Mind MappingMind MappingFree4.6★ (379)YesYesOct 2026
5Flowdia DiagramsFlowdia DiagramsFree3.4★ (66)NoYesOct 2026
6Diagram: Daily Concept SummaryDiagram: Daily Concept SummaryFree5.0★ (1)NoNoAug 2026
7Xmind: AI Mind Map, BrainstormXmind: AI Mind Map, BrainstormFree4.8★ (7K)NoYesOct 2026
8Minkowski diagramMinkowski diagramFree—NoNoMay 2026

Top Picks for Diagram

Lucidchart#1

Lucidchart by Lucid Software Inc

Flowchart & Diagram Maker
Editor's Choice
📊 Productivity
4.6😞(5.3K ratings)
FreeAdsIn-App Purchases
Lucidchart screenshot 1
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Lucidchart screenshot 5

Create and view diagrams like flowcharts, mind maps, and org charts on your mobile device. This visual workspace facilitates real-time collaboration and data visualization. Diagrams sync instantly to your account and can be exported in various formats.

What We Love

  • 🚀 Intuitive interface
  • 👍 Great for creating diagrams and flowcharts
  • 💡 Useful templates and shapes

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 🔒 Locked features behind paywall
  • 👎 Poor mobile experience compared to web version
  • 🚫 Not available for individual users, only teams/enterprises
Carmin#2

Carmin by Chuan Nguyen Van

Automotive Wiring Diagrams
Strong Contender
🔍 Reference
4.3😐(223 ratings)
FreeAdsIn-App Purchases
Carmin screenshot 1
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Access a comprehensive library of regularly updated automotive electrical wiring diagrams for car repair and study. Includes videos and technical documents for research and reference.

What We Love

  • 📚 Comprehensive vehicle diagram database
  • 💰 Free version available with good content
  • 🎯 Helpful for car diagnostics and repairs
  • ⚡ Quick access to wiring information
  • 🌍 Supports multiple vehicle brands and models
  • 👍 User-friendly interface and organization
  • 💡 Valuable tool for mechanics and DIY enthusiasts

Room to Improve

  • 📺 Excessive advertisements in free version
  • 🐛 Frequent app crashes and instability on iOS
  • 🚫 Limited vehicle coverage (missing years and models)
  • 🔤 Diagrams display as code/symbols instead of images
  • 🌐 Language limitations (primarily English)
  • 🔍 Poor search and navigation functionality
  • ⚠️ Malicious/deceptive ads with fake close buttons
  • 📱 Right-hand drive vehicles not supported
  • 🔧 Missing diesel truck variants
  • ⏱️ Slow loading and performance issues

More Diagram apps to explore

FAQ about Diagram

What are the best diagram apps & games for iPhone?
Lucidchart tops our diagram apps & games ranking as of October 2026, with a 4.6-star average from 5.3K App Store ratings, and it's free to download.
Yes — 20 of the top diagram apps & games we rank are free to download, including Lucidchart and Carmin.
Lucidchart shows ads and has no in-app purchases, according to its App Store listing as of October 2026.
We track 248+ diagram apps & games on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.

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