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Best Chatgpt 4.0 Free Apps

250+ iOS apps curated and reviewed

4.7 avg rating
20 free apps
Updated August 2026

ChatGPT is the household name in chatgpt 4.0 free, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Chatgpt 4.0 Free Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ChatGPTChatGPTFree4.8★ (9.5M)YesYesAug 2026
2AI Chat 5.6: GeniusAI Chat 5.6: GeniusFree4.7★ (52K)NoYesAug 2026
3AI Chat 4.0: Open Chatbot 4oAI Chat 4.0: Open Chatbot 4oFree4.5★ (2K)NoYesAug 2026
4AI Chat Assistant – ChatNowAI Chat Assistant – ChatNowFree4.8★ (139K)YesYesAug 2026
5ChatOn AI - Chat Bot AssistantChatOn AI - Chat Bot AssistantFree4.7★ (283K)YesYesAug 2026
6ChatGPT for IntuneChatGPT for IntuneFree3.6★ (21)YesNoAug 2026
7Google GeminiGoogle GeminiFree4.7★ (2.1M)NoYesAug 2026
8Chat AI - Ask AnythingChat AI - Ask AnythingFree4.8★ (130K)YesYesAug 2026

Top Picks for Chatgpt 4.0 Free

ChatGPT#1

ChatGPT by OpenAI OpCo, LLC

Your everyday AI assistant
Editor's Choice
📊 Productivity
4.8😊(9.5M 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

Room to Improve

  • 🐛 Occasional inaccuracies or inconsistencies in responses
  • 🔖 Limited to pre-2021 data, lacking real-time updates
  • 🔒 Concerns about privacy and data usage
AI Chat 5.6: Genius#2

AI Chat 5.6: Genius by Torqued Studios LLC

Built on GPT Plus Images 2.0
Strong Contender
🔧 Utilities
4.7😊(52K ratings)
FreeIn-App Purchases
AI Chat 5.6: Genius screenshot 1
AI Chat 5.6: Genius screenshot 2
AI Chat 5.6: Genius screenshot 3
AI Chat 5.6: Genius screenshot 4
AI Chat 5.6: Genius screenshot 5
AI Chat 5.6: Genius screenshot 6

This AI-powered tool can generate and edit images, write and rewrite text for various purposes, and explain content from photos or documents. It also provides up-to-date web search results and can analyze files like PDFs and spreadsheets.

What We Love

  • 🚀 Wonderful, personal assistant
  • 🚀 Amazing and helpful
  • 👍 Unbelievable and a life-changer
  • 👍 Accurate and fast responses

Room to Improve

  • 🐛 Inconsistent and buggy responses
  • 🔒 Subscription issues and paywall
  • 🔒 Expensive for some users
AI Chat 4.0: Open Chatbot 4o#3

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

Image, Photo & Text Generator
Worth Considering
📊 Productivity
4.5😞(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

More Chatgpt 4.0 Free apps to explore

4
AI Chat Assistant – ChatNow
AI Chat Assistant – ChatNow
AI Chat Assistant – ChatNow
Built on Gemini, GPT-5, Grok 4
Free

This AI assistant helps busy individuals boost productivity by handling tasks like writing emails, generating code, creating images, and summarizing documents. It supports voice input, file uploads, and image analysis, leveraging multiple advanced AI models for diverse needs.

Voice mode for real-time conversationsImage and video generationWriting and grammar assistance
📊 Productivity
(139K)
free with in-app purchases
5
ChatOn AI - Chat Bot Assistant
ChatOn AI - Chat Bot Assistant
ChatOn AI - Chat Bot Assistant
One Chatbot–Multiple Al Tools
Free

This AI assistant leverages advanced language models to help with writing, image transformation, document analysis, and web research. It offers over 100 prompts and integrates with your keyboard for seamless use across apps. Transform photos, summarize documents, and generate social media content with ease.

AI Chatbot & Virtual AssistantAI Writing AssistantPic Transformer (AI Photo Editing)
📊 Productivity
(283K)
free with in-app purchases
6
ChatGPT for Intune
ChatGPT for Intune
ChatGPT for Intune
Managed ChatGPT for work
Free

Access OpenAI's advanced AI for work or school with this Intune-managed app. Generate images, engage in voice conversations, and process documents hands-free. It helps draft content, summarize information, and brainstorm ideas for faster task completion.

Image generation from descriptionsAdvanced Voice Mode for conversationsFile and photo summarization
📊 Productivity
(21)
ad-supported
7
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
(2.1M)
free with in-app purchases
8
Chat AI - Ask Anything
Chat AI - Ask Anything
Chat AI - Ask Anything
AI Chatbot & Essay Writer Bot
Free

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.

Intelligent conversationsPersonalized responsesEssay and content writing
📊 Productivity
(130K)
free with in-app purchases
9
ChatBox AI - Chatbot Assistant
ChatBox AI - Chatbot Assistant
ChatBox AI - Chatbot Assistant
Top Al models・Image Generator
Free

This AI-powered assistant offers a suite of tools for text generation, image creation, document processing, and real-time information retrieval. It can help with writing, problem-solving, brainstorming, and even generating music and stories.

AI text generationAI image generationDocument summarization and translation
📊 Productivity
(164K)
free with in-app purchases
10
Chat AI: Ask Agent Anything
Chat AI: Ask Agent Anything
Chat AI: Ask Agent Anything
Chatbot & Search Assistant
Free

Engage in personalized conversations with an AI that understands and adapts to you. Access specialized AI assistants for various tasks, generate unique images from text, and get instant information about the world through photos. This app also offers writing assistance, language learning, and homework help.

Personalized AI conversationsSpecialized AI assistantsAI image generation
📊 Productivity
(326K)
free with in-app purchases
11
Google Chat
Google Chat
Google Chat
Efficient Team Communication
Free

Connect, collaborate, and accomplish tasks with AI-powered messaging. Streamline teamwork with integrations and smart features. Securely communicate with your team, whether in real-time or asynchronously.

AI-powered conversation summariesAutomatic message translationAI-powered search
💼 Business
(305K)
free with in-app purchases
12
AI Chat & Smart Chatbot
AI Chat & Smart Chatbot
AI Chat & Smart Chatbot
Your AI Copilot
Free

This AI-powered communication tool offers rapid text generation and custom chat creation. It allows users to store conversations and organize important text for easy access, enhancing online interaction efficiency.

Lightning-fast text generationPowered by GPT-4Create custom chats
📊 Productivity
(1)
free
13
ChatGTPro - 中文版Ai人工智能官方助手5.0
ChatGTPro - 中文版Ai人工智能官方助手5.0
ChatGTPro - 中文版Ai人工智能官方助手5.0
中文正版模型，AI智能聊天、写作创作、翻译与高效人工智能助手
Free

This AI assistant offers natural, intelligent conversations for information, suggestions, and creative inspiration. It aids in various tasks like writing, translation, learning, and idea generation, serving as a reliable smart helper for daily life.

Intelligent chat and Q&AContent writing and creationTranslation and proofreading
🔍 Reference
(0)
free with in-app purchases
14
AI Chatbot: Ask AI Assistant 5
AI Chatbot: Ask AI Assistant 5
AI Chatbot: Ask AI Assistant 5
Built on GPT-4, GPT-5, GPT-5.6
Free

This AI assistant offers intelligent conversations for writing, learning, and content creation. It helps generate text, answer questions, analyze documents, and brainstorm ideas to boost productivity.

Unlimited AI chat conversationsContent writing and text generationDocument analysis via file upload
📊 Productivity
(16)
free with in-app purchases
15
Chat Unlimited & Ask Brutus AI
Chat Unlimited & Ask Brutus AI
Chat Unlimited & Ask Brutus AI
Chat using GPT-5, Grok, Claude
Free

Engage in intelligent conversations with an AI assistant powered by advanced language models and internet search. This app offers a free mode, stores past conversations, and assists with various tasks, learning, and creative endeavors. Enjoy a private and secure chat experience with a user-friendly interface.

AI Chat Bot AssistantOpenAI GPT-4 API integrationInternet Search capabilities
📚 Education
(1.1K)
free with in-app purchases
16
ChatPro4- AI Chatbot
ChatPro4- AI Chatbot
ChatPro4- AI Chatbot
Powered by 4.0 & Writer Bot
Free

Engage in natural conversations with an AI assistant for advice, information, and creative tasks. It offers writing assistance, translation, planning, and programming help, powered by an advanced AI model with vision and speech-to-text capabilities.

Advanced AI model (4.0)Vision modeling for picture conversationsSpeech-to-text for efficiency
🔧 Utilities
(2)
free with in-app purchases
17
ChatAI - GPT Chat App
ChatAI - GPT Chat App
ChatAI - GPT Chat App
Powered by ChatGPT API
Free
🔧 Utilities
(0)
18
TiTi - Chat
TiTi - Chat
TiTi - Chat
TiTi Chat
Free

A free and fast private messenger platform for creating wonderful moments. This cloud-based app offers full security and special features for mobile and browser messaging.

Private messagingCloud-basedFull security
🌐 Social Networking
(1)
free
19
Chat 5 0: AI Chat & Writing
Chat 5 0: AI Chat & Writing
Chat 5 0: AI Chat & Writing
Text,Voice & Image generator
Free

This AI-powered writing assistant leverages advanced language models to help users generate text, draft documents, and improve their writing. It offers features for essays, emails, stories, and even math problem-solving.

AI-generated text contentMath equation solverVersatile writing assistance
📊 Productivity
(1.5K)
subscription
20
Chatbot AI - AI Toolkits
Chatbot AI - AI Toolkits
Chatbot AI - AI Toolkits
Chat with the omnipotent AIBot
Free

Engage in conversations with an advanced AI assistant powered by ChatGPT technology. Access comprehensive answers and suggestions on a wide range of topics without the need for an account. Enjoy a private and convenient way to explore information and entertainment.

ChatGPT powered AINo account requiredMaximum privacy protection
📊 Productivity
(1)
free with in-app purchases

FAQ about Chatgpt 4.0 Free

What are the best chatgpt 4.0 free apps for iPhone?
ChatGPT tops our chatgpt 4.0 free apps ranking as of August 2026, with a 4.8-star average from 9.5M App Store ratings, and it's free to download.
ChatGPT shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 250+ chatgpt 4.0 free 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.