Best Codex Apps

249+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated November 2026

With an average user rating of 4.5★, the codex category is one of the App Store's strongest. Browse all 249+ apps we track, sorted so the most loved ones surface first.

Compare top Codex Apps (November 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ChatGPTChatGPTFree4.8★ (12M)YesYesNov 2026
2Claude by AnthropicClaude by AnthropicFree4.7★ (298K)NoYesNov 2026
3GrokGrokFree4.9★ (1.6M)NoYesNov 2026
4Codex Relay - Remote Codex AppCodex Relay - Remote Codex AppFree4.2★ (57)NoNoNov 2026
5GitHubGitHubFree4.8★ (39K)NoYesNov 2026
6Google GeminiGoogle GeminiFree4.7★ (2.4M)NoYesNov 2026
7XXFree4.6★ (11M)YesYesNov 2026
8Codex AI - Remote CodexCodex AI - Remote CodexFree4.7★ (31)NoYesNov 2026

Top Picks for Codex

ChatGPT#1

ChatGPT by OpenAI OpCo, LLC

Your everyday AI assistant
Editor's Choice
📊 Productivity
4.8😊(12M ratings)
FreeAdsIn-App Purchases
#1in Productivity
ChatGPT screenshot 1
ChatGPT screenshot 2
ChatGPT screenshot 3
ChatGPT screenshot 4
ChatGPT screenshot 5
ChatGPT screenshot 6

This AI assistant offers advanced conversational abilities, image generation, and voice interaction. It helps with creative inspiration, personalized learning, professional input, and instant answers to your queries. Syncs history across devices for seamless use.

What We Love

  • 🚀 Powerful and versatile AI assistant
  • 👍 Intuitive and user-friendly interface
  • 🤖 Impressive conversational abilities
  • 💡 Convenient mobile access to ChatGPT
  • 🧠 Vast knowledge base on diverse topics
  • 🔍 Helpful for research, writing, and problem-solving
  • 🤝 Feels like an intelligent companion

Room to Improve

  • 🐛 Occasional inaccuracies or inconsistencies in responses
  • 🔖 Limited to pre-2021 data, lacking real-time updates
  • 🔒 Concerns about privacy and data usage
  • 🔍 Difficulty in navigating and managing conversation history
Claude by Anthropic#2

Claude by Anthropic by Anthropic PBC

AI assistant for life and work
Strong Contender
📊 Productivity
4.7😊(298K ratings)
FreeIn-App Purchases
#2in Productivity
Claude by Anthropic screenshot 1
Claude by Anthropic screenshot 2
Claude by Anthropic screenshot 3
Claude by Anthropic screenshot 4
Claude by Anthropic screenshot 5
Claude by Anthropic screenshot 6

This AI assistant helps you write, research, code, and solve complex problems. It refines your writing, debugs code, analyzes data and visuals, and offers insights with citations. Connect your cloud storage for personalized context and use voice dictation for hands-free brainstorming.

What We Love

  • 🚀 Powerful and versatile AI assistant
  • 👍 Intuitive and easy to use interface
  • 💡 Innovative features like 'Projects'
  • 🤖 Intelligent and thoughtful responses
  • 📚 Comprehensive knowledge base
  • 🔍 Helpful for a wide range of tasks

Room to Improve

  • 🔒 Concerns about privacy and data usage
  • 🚫 Limitations on free usage and throttling
  • 🐛 Occasional bugs and crashes
  • 🙅‍♀️ Overly restrictive content policies
  • 🤖 Lack of true conversational abilities
Grok#3

Grok by X Corp.

AI assistant by SpaceXSI
Worth Considering
📊 Productivity
4.9😊(1.6M ratings)
FreeIn-App Purchases
#4in Productivity
Grok screenshot 1
Grok screenshot 2
Grok screenshot 3
Grok screenshot 4
Grok screenshot 5

This AI assistant provides truthful, useful, and curious responses for research, creation, and understanding. It offers advanced image and video generation, real-time information from X, and natural voice conversations. Easily transfer context from other AI tools to enhance your workflow.

What We Love

  • 🚀 Fast and efficient
  • 🔒 Unbiased and ethical
  • 👍 Clean and intuitive UI
  • 🤖 Powerful AI capabilities
  • 🌐 Real-time data integration
  • 🎨 Impressive image generation
  • 💡 Unique and engaging personality

Room to Improve

  • 🐛 Occasional errors in responses
  • 🔍 Needs more robust search/history features
  • 🔌 Requires X account for full functionality

More Codex apps to explore

FAQ about Codex

What are the best codex apps for iPhone?
ChatGPT tops our codex apps ranking as of November 2026, with a 4.8-star average from 12M App Store ratings, and it's free to download.
Yes — 20 of the top codex apps we rank are free to download, including ChatGPT and Claude by Anthropic.
ChatGPT shows ads and offers in-app purchases, according to its App Store listing as of November 2026.
We track 249+ codex apps on the iOS App Store as of November 2026, ranked by rating, recency, and analysis of real user reviews.

Related searches