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Best Gpt 4O Apps

249+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated September 2026

The best gpt 4o apps on iPhone average 4.6★ across 249+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.

Compare top Gpt 4O Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1AI Chat 4.0: Open Chatbot 4oAI Chat 4.0: Open Chatbot 4oFree4.5★ (2.2K)NoYesSep 2026
2ChatGPTChatGPTFree4.8★ (10M)YesYesSep 2026
3Chat AI - Ask AnythingChat AI - Ask AnythingFree4.8★ (130K)YesYesSep 2026
4Chatbot AI: AI Chat AssistantChatbot AI: AI Chat AssistantFree4.6★ (6.5K)NoYesSep 2026
5AI Chat 6.0: GeniusAI Chat 6.0: GeniusFree4.7★ (53K)NoYesSep 2026
6Chat Unlimited & Ask Brutus AIChat Unlimited & Ask Brutus AIFree4.5★ (1.1K)NoYesSep 2026
7AI Chat Assistant – ChatNowAI Chat Assistant – ChatNowFree4.8★ (141K)YesYesSep 2026
8Goth AI: Study AI Helper GPT4oGoth AI: Study AI Helper GPT4oFree—YesYesAug 2026

Top Picks for Gpt 4O

AI Chat 4.0: Open Chatbot 4o#1

AI Chat 4.0: Open Chatbot 4o by Liquid Apps Kft.

Image, Photo & Text Generator
Editor's Choice
📊 Productivity
4.5😞(2.2K ratings)
FreeIn-App Purchases
AI Chat 4.0: Open Chatbot 4o screenshot 1
AI Chat 4.0: Open Chatbot 4o screenshot 2
AI Chat 4.0: Open Chatbot 4o screenshot 3
AI Chat 4.0: Open Chatbot 4o screenshot 4
AI Chat 4.0: Open Chatbot 4o screenshot 5

This app offers a versatile AI assistant powered by advanced models like GPT-5.4 and Gemini 3.1 Pro. It excels at generating text, images, translations, and personalized plans for travel, fitness, and meals. Seamlessly switch between models for optimal results in everyday tasks, creativity, and learning.

What We Love

  • 🚀 Awesome tool
  • 💡 The best AI app I ever used
  • 👍 Very useful in many ways
  • 👍 This is the best!

Room to Improve

  • 🐛 Do not purchase this app!
  • 🐛 Not worth it!
  • 🐛 Lila
  • 🐛 Hard to use
  • 🐛 Disappointed
  • 🐛 Asks me if I want to upgrade every question
  • 🐛 Very disappointed.
  • 🐛 Misleading and fraud
  • 🐛 Needs work
  • 🐛 No good for free plan
  • 🐛 Описание приложения.
  • 🐛 A very poor app
  • 🐛 I don't like that the particular one doesn't have the voice.
ChatGPT#2

ChatGPT by OpenAI OpCo, LLC

Your everyday AI assistant
Strong Contender
📊 Productivity
4.8😊(10M 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 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
  • 🧠 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
Chat AI - Ask Anything#3

Chat AI - Ask Anything by ElevenThirteen LLC

AI Chatbot & Essay Writer Bot
Worth Considering
📊 Productivity
4.8😊(130K ratings)
FreeAdsIn-App Purchases
Chat AI - Ask Anything screenshot 1
Chat AI - Ask Anything screenshot 2
Chat AI - Ask Anything screenshot 3
Chat AI - Ask Anything screenshot 4
Chat AI - Ask Anything screenshot 5
Chat AI - Ask Anything screenshot 6

Engage in intelligent conversations with an advanced AI chatbot. This app offers personalized responses on a wide range of topics and can assist with writing tasks like essays and emails. Its AI continuously learns for more natural interactions.

What We Love

  • 🚀 Helpful AI with fast responses
  • 👍 Useful for general advice and tasks
  • 👍 Impressive and accurate responses
  • 👍 Convenient and easy to use
  • 👍 Provides detailed and informative answers

Room to Improve

  • 🐛 App crashes or becomes unavailable at times
  • 🔒 Limited free usage, requires paid subscription
  • 🔒 Frustrating when reaching daily usage limit
  • 🐛 Occasional issues with text formatting and output

More Gpt 4O apps to explore

FAQ about Gpt 4O

What are the best gpt 4o apps for iPhone?
AI Chat 4.0: Open Chatbot 4o tops our gpt 4o apps ranking as of September 2026, with a 4.5-star average from 2.2K App Store ratings, and it's free to download.
Yes — 19 of the top gpt 4o apps we rank are free to download, including AI Chat 4.0: Open Chatbot 4o and ChatGPT.
AI Chat 4.0: Open Chatbot 4o has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 249+ gpt 4o apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app uniquely combines multiple leading AI models, including GPT-5.4, Grok 4.2, Gemini 3.1 Pro, and Claude Opus 4.6, within a single interface. This allows users to switch between models to find the best one for specific requests, offering a more versatile and powerful AI experience.
This AI assistant is designed for a wide range of tasks, including answering questions, generating professional emails and content, creating unique AI images from text prompts, translating languages, planning meals based on available ingredients, creating personalized fitness plans, and building travel itineraries.

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