Best Openai Codex Apps

250+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated August 2026

Finding the right openai codex apps can be overwhelming with so many options. We've analyzed 250+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Compare top Openai Codex Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ChatGPTChatGPTFree4.8★ (9.8M)YesYesSep 2026
2Codex AI - Remote CodexCodex AI - Remote CodexFree1.0★ (1)NoYesAug 2026
3Mobile IDE for Codex AI GPTMobile IDE for Codex AI GPTFree4.0★ (1)NoYesAug 2026
4Claude by AnthropicClaude by AnthropicFree4.7★ (251K)NoYesSep 2026
5Codex AI : Remote CodexCodex AI : Remote CodexFree4.8★ (19)NoYesSep 2026
6Google GeminiGoogle GeminiFree4.7★ (2.2M)NoYesSep 2026
7Codex Relay - Remote Codex AppCodex Relay - Remote Codex AppFree4.3★ (42)NoNoSep 2026
8Happy: Codex & Claude Code AppHappy: Codex & Claude Code AppFree4.9★ (991)NoYesSep 2026

Top Picks for Openai Codex

ChatGPT#1

ChatGPT by OpenAI OpCo, LLC

Your everyday AI assistant
Editor's Choice
📊 Productivity
4.8😊(9.8M ratings)
FreeAdsIn-App Purchases
#1in Productivity
ChatGPT screenshot 1
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ChatGPT screenshot 6

This app provides access to advanced AI capabilities, including text generation, image creation from descriptions, and voice conversations. It offers personalized advice, creative inspiration, and instant answers for various tasks, syncing history across devices.

What We Love

  • 🚀 Powerful and versatile AI assistant
  • 👍 Intuitive and user-friendly interface
  • 🤖 Impressive conversational abilities
  • 💡 Convenient mobile access to ChatGPT

Room to Improve

  • 🐛 Occasional inaccuracies or inconsistencies in responses
  • 🔖 Limited to pre-2021 data, lacking real-time updates
  • 🔒 Concerns about privacy and data usage
Codex AI - Remote Codex#2

Codex AI - Remote Codex by Ariadni Deligianni

VibeCode
Strong Contender
📊 Productivity
1.0(1 ratings)
FreeIn-App Purchases
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This AI-powered assistant helps you organize tasks, plan projects, and draft content. Simply describe your needs in plain language to generate structured plans, notes, and summaries, streamlining your workflow from idea to action.

Mobile IDE for Codex AI GPT#3

Mobile IDE for Codex AI GPT by Uladzsislau Luchkouski

Remote Coding Agent & CLI
Worth Considering
🛠️ Developer Tools
4.0(1 ratings)
FreeIn-App Purchases
Mobile IDE for Codex AI GPT screenshot 1
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This app provides a mobile interface for a desktop AI coding environment, allowing developers to edit code, run commands, manage Git, and interact with AI assistants from their iPhone. It enables productive use of idle moments by offering real-time access to projects and a built-in terminal.

More Openai Codex apps to explore

4
Claude by Anthropic
Claude by Anthropic
Claude by Anthropic
AI assistant for life and work
Free

This AI assistant helps you write, research, code, and solve complex problems. It can analyze documents, code, and images, and even respond to voice commands. Expand your capabilities and tackle new projects with this intelligent thinking partner.

AI writing assistanceCoding and programming helpResearch and data insights
📊 Productivity
(251K)
free with in-app purchases
5
Codex AI : Remote Codex
Codex AI : Remote Codex
Codex AI : Remote Codex
by Vedat TANONUT
Free

This AI-powered assistant helps you plan, organize, write, and analyze tasks efficiently. It offers features like coding assistance, smart Q&A, project management, and file summarization to streamline your workflow.

AI Coding AssistanceSmart Q&AProject Organization
📊 Productivity
(19)
freemium
6
Google Gemini
Google Gemini
Google Gemini
Your AI assistant from Google
Free

This AI assistant helps you brainstorm, create content, and simplify complex topics. It integrates with your Google apps to provide personalized assistance, plan trips, and study smarter. Upgrade for advanced features like video generation and deeper research capabilities.

Unlimited prompting with Gemini 3 FlashLive interaction via camera/screen sharingContent creation (mockups, posters, diagrams)
📊 Productivity
(2.2M)
free with in-app purchases
7
Codex Relay - Remote Codex App
Codex Relay - Remote Codex App
Codex Relay - Remote Codex App
Codex on your phone
Free

Manage your Codex workflow remotely from your phone. Track active threads, send prompts, review output, and respond to requests. Designed for developers to stay connected to their work without being at their desk.

Follow Codex conversations remotelySend prompts and follow-up instructionsRespond to approval and input requests
🛠️ Developer Tools
(42)
free
8
Happy: Codex & Claude Code App
Happy: Codex & Claude Code App
Happy: Codex & Claude Code App
Codex & Claude Code on the go
Free

This app provides a secure mobile interface for AI coding assistants, allowing you to continue sessions and monitor progress from anywhere. It features end-to-end encryption and a zero-knowledge architecture for ultimate privacy. Seamlessly switch between desktop and mobile for uninterrupted AI coding.

Seamless desktop and mobile session continuationPush notifications for AI tasksOffline access to conversation history
🛠️ Developer Tools
(991)
free with in-app purchases
9
DeepSeek - AI Assistant
DeepSeek - AI Assistant
DeepSeek - AI Assistant
Intelligent AI Assistant
Free

This AI assistant offers free, intelligent help powered by a cutting-edge model. It provides rapid responses and advanced capabilities to enhance problem-solving and daily efficiency.

Intelligent AI assistantPowered by flagship AI modelFaster response times
📊 Productivity
(11K)
free
10
WhatsApp Messenger
WhatsApp Messenger
WhatsApp Messenger
Simple. Reliable. Private.
Free

Connect with friends and family globally through private messaging and high-quality calls. Share moments, documents, and stay in touch across devices, even on slow connections. Your conversations are secured with end-to-end encryption.

End-to-end encrypted messagingHigh-quality voice and video callsGroup chats and calls
🌐 Social Networking
(19M)
free with in-app purchases
11
Perplexity - AI Search & Chat
Perplexity - AI Search & Chat
Perplexity - AI Search & Chat
Ask. Research. Trusted Answers
Free

Get accurate, source-backed answers to any question with this AI-powered search and chat tool. It leverages top AI models for deep research, drafting emails, and more, syncing across devices. Discover new information and organize your findings in a personal library.

AI-powered search with cited sourcesDeep research and guided explorationConversational follow-up questions
📊 Productivity
(501K)
free with in-app purchases
12
Google Maps
Google Maps
Google Maps
Places, navigation & traffic
Free

Navigate your world with real-time traffic, turn-by-turn directions for driving, walking, cycling, and public transport. Discover millions of businesses and places with photos and reviews. Plan trips with Street View, Immersive View, and offline maps.

Real-time GPS navigationLive traffic dataPublic transport updates
🗺️ Navigation
(7.3M)
free with in-app purchases
13
Locally AI by LM Studio
Locally AI by LM Studio
Locally AI by LM Studio
Local & Private AI Assistant
Free

This app allows you to run powerful AI models directly on your iPhone or iPad without an internet connection. Enjoy complete privacy as no data is collected or sent to servers. It's optimized for Apple devices, offering fast and private AI interactions.

Run AI models offlinePrivate and no data collectionSupports Llama, Gemma, Qwen, and more
📊 Productivity
(1.5K)
paid
14
Omnara: Claude & Codex Mobile
Omnara: Claude & Codex Mobile
Omnara: Claude & Codex Mobile
Claude Code & Codex on the go
Free

Control your AI coding agents from your phone. Monitor, steer, and approve live AI coding sessions in real time, anywhere. Supports Claude Code and Codex, with features like voice coding and live localhost previews.

Mobile control for AI coding agentsClaude Code & Codex supportSeamless cloud sync & local handoff
🛠️ Developer Tools
(35)
free with in-app purchases
15
Codex Meter
Codex Meter
Codex Meter
by Tom Fadial
Free
🛠️ Developer Tools
(0)
16
Manus - AI Agent & Automation
Manus - AI Agent & Automation
Manus - AI Agent & Automation
Web Dev, Slides, research
Free

This AI agent bridges thought and action by autonomously planning, researching, and delivering finished products on a virtual computer. It handles complex tasks like data analysis, slide deck generation, and media creation, working asynchronously in the cloud and notifying you upon completion.

Autonomous task planning and executionAdvanced data analysis and reportingBoardroom-quality slide deck generation
📊 Productivity
(37K)
free with in-app purchases
17
Grok AI
Grok AI
Grok AI
AI chat & video generation
Free

This AI assistant provides fast, truthful answers and can perform deep web research. It generates striking images and videos from text or voice prompts, and can analyze uploaded content. Engage in conversations with personalized AI companions and access real-time information from X.

AI-powered Q&A and web researchAI image and video generationVoice mode with live camera
📊 Productivity
(1.4M)
free with in-app purchases
18
Happier - Remote Claude, Codex
Happier - Remote Claude, Codex
Happier - Remote Claude, Codex
OpenCode, Pi, Grok coding app
Free

This app acts as a secure bridge for AI coding agents, allowing you to run and continue sessions from your computer on your phone. It supports collaboration, reliable session resuming, and full history access with end-to-end encryption.

Collaborative coding sessionsSupport for multiple AI providersPersistent and resumable sessions
🛠️ Developer Tools
(10)
free
19
iCodex: Claude & Codex Usage
iCodex: Claude & Codex Usage
iCodex: Claude & Codex Usage
Quota, Tokens & Widgets
Free
🔧 Utilities
(0)
20
Kimi - Kimi K3 is Live
Kimi - Kimi K3 is Live
Kimi - Kimi K3 is Live
K3,Code,Slides,Agent Swarm
Free

This AI-powered agent assists with coding, content creation, and office tasks. It can generate presentations, build websites from designs, and perform complex research with autonomous sub-agents for enhanced efficiency. Handle large documents and detailed conversations with its extensive context window.

Autonomous sub-agent creation for parallel efficiencyCode, create, analyze, and build presentationsAutomate workflows with scheduled tasks and long-term memory
📊 Productivity
(5.1K)
freemium

FAQ about Openai Codex

What are the best openai codex apps for iPhone?
ChatGPT tops our openai codex apps ranking as of August 2026, with a 4.8-star average from 9.8M App Store ratings, and it's free to download.
Yes — 20 of the top openai codex apps we rank are free to download, including ChatGPT and Codex AI - Remote Codex.
ChatGPT shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 250+ openai codex apps on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app provides access to advanced AI capabilities, allowing users to generate text, create images from descriptions, and engage in real-time voice conversations. It can offer creative inspiration, tailored advice, personalized learning assistance, and instant answers for a wide range of queries.
Key features include generating original images from text descriptions, engaging in advanced voice conversations, uploading photos to transcribe or get information, and receiving creative inspiration or tailored advice. It also supports personalized learning and professional brainstorming.