Best Knowledge Graph Apps

249+ iOS apps curated and reviewed

4.6 avg rating
18 free apps
Updated September 2026

If you already know TheBrain, this is the deeper bench. 249+ knowledge graph apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.

Compare top Knowledge Graph Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1TheBrain: Smart Notes & LinksTheBrain: Smart Notes & LinksFree4.8★ (171)NoYesNov 2026
2Aether - Knowledge EngineAether - Knowledge EngineFree5.0★ (1)NoNoOct 2026
3Ounie: AI Second BrainOunie: AI Second BrainFree—NoYesNov 2026
4KnowledgeGraphKnowledgeGraph$2.99—NoNoAug 2026
5WikovaWikovaFree—NoNoJun 2026
6Knowledge from OnlineObjectsKnowledge from OnlineObjectsFree5.0★ (2)NoNoMay 2026
7Kinnu - General KnowledgeKinnu - General KnowledgeFree4.8★ (516)NoYesNov 2026
8Graphica: Graph AlgorithmsGraphica: Graph AlgorithmsFree—NoNoJul 2026

Top Picks for Knowledge Graph

TheBrain: Smart Notes & Links#1
4.8😊(171 ratings)
FreeIn-App Purchases
TheBrain: Smart Notes & Links screenshot 1
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TheBrain: Smart Notes & Links screenshot 6

This app helps you capture, connect, and visualize all your ideas, notes, and files across devices. It acts as a digital memory, showing related items and allowing for dynamic mind mapping and powerful search to help you recall information instantly.

What We Love

  • 🚀 Seamless navigation
  • 🔒 Secure cloud sync
  • 👍 Intuitive interface
  • 🚀 Powerful features
  • 👍 Excellent for knowledge management
  • 👍 Versatile for various use cases
  • 👍 Impressive functionality
  • 👍 Fluid and elegant
  • 👍 Comprehensive data storage

Room to Improve

  • 🐛 Crashes and freezes
  • 🐛 Buggy on iOS 9
  • 💰 Expensive subscription
  • 🐛 Limited functionality on mobile
  • 🐛 Confusing UI and navigation
  • 🐛 Syncing issues
  • 🐛 Lack of offline mode

More Knowledge Graph apps to explore

FAQ about Knowledge Graph

What are the best knowledge graph apps for iPhone?
TheBrain: Smart Notes & Links tops our knowledge graph apps ranking as of September 2026, with a 4.8-star average from 171 App Store ratings, and it's free to download.
Yes — 18 of the top knowledge graph apps we rank are free to download, including TheBrain: Smart Notes & Links and Aether - Knowledge Engine.
TheBrain: Smart Notes & Links has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ knowledge graph apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.