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Best Openai Api Apps

235+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated July 2026

If you already know Claude by Anthropic, this is the deeper bench. 235+ openai api apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of July 2026.

Compare top Openai Api Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Claude by AnthropicClaude by AnthropicFree4.7★ (207K)NoYesJul 2026
2Chat AI PlusChat AI PlusFree4.7★ (1.5K)NoYesJul 2026
3Chat API – AI WrapperChat API – AI WrapperFree5.0★ (4)YesYesJul 2026
4Cumbersome: AI LLM API ClientCumbersome: AI LLM API ClientFree4.9★ (41)NoNoJul 2026
5Liquid ApolloLiquid ApolloFree was $5.994.5★ (599)NoNoJul 2026
6Google GeminiGoogle GeminiFree4.7★ (2M)NoYesJul 2026
7OpenCat - AI Chat, Agent, MCPOpenCat - AI Chat, Agent, MCPFree4.6★ (835)NoYesJul 2026
8Perplexity - AI Search & ChatPerplexity - AI Search & ChatFree4.8★ (490K)NoYesJul 2026

Top Picks for Openai Api

Claude by Anthropic#1

Claude by Anthropic by Anthropic PBC

AI assistant for life and work
Editor's Choice
📊 Productivity
4.7😊(207K 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 can analyze documents, code, and images, and even respond to voice commands. Expand your capabilities and tackle new projects with this intelligent thinking partner.

What We Love

  • 🚀 Powerful and versatile AI assistant
  • 👍 Intuitive and easy to use interface
  • 💡 Innovative features like 'Projects'
  • 🤖 Intelligent and thoughtful responses

Room to Improve

  • 🔒 Concerns about privacy and data usage
  • 🚫 Limitations on free usage and throttling
  • 🐛 Occasional bugs and crashes
Chat AI Plus#2

Chat AI Plus by Dmytro Karasev

Powered by ChatGPT OpenAI Api
Strong Contender
📊 Productivity
4.7(1.5K ratings)
FreeIn-App Purchases
Chat AI Plus screenshot 1
Chat AI Plus screenshot 2
Chat AI Plus screenshot 3
Chat AI Plus screenshot 4
Chat AI Plus screenshot 5
Chat AI Plus screenshot 6

This app offers advanced AI-powered chat capabilities, leveraging cutting-edge models for insightful responses. It assists with tasks like document analysis, image generation, and voice-to-text conversion, simplifying daily life and boosting productivity.

Chat API – AI Wrapper#3

Chat API – AI Wrapper by Andres Nunez Soto

Your AI, Your Keys, Your Way
Worth Considering
🛠️ Developer Tools
5.0(4 ratings)
FreeAdsIn-App Purchases
Chat API – AI Wrapper screenshot 1
Chat API – AI Wrapper screenshot 2
Chat API – AI Wrapper screenshot 3
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Access powerful AI models locally or through cloud APIs. This tool offers flexible integration with GPT-4, OpenAI, Grok, and local LLMs for diverse tasks like coding, drafting, and research.

More Openai Api apps to explore

4
Cumbersome: AI LLM API Client
Cumbersome: AI LLM API Client
Cumbersome: AI LLM API Client
API to ChatGPT, OpenAI, Ollama
Free

Connect directly to AI provider APIs for greater control over model selection and parameters. Compare different AI models, pay per use, and customize responses with advanced features. Supports multiple providers and custom endpoints.

Direct API connectionsMulti-provider supportFull parameter control
📊 Productivity
(41)
free
5
Liquid Apollo
Liquid Apollo
Liquid Apollo
Fast, private, and reliable AI
Free
$5.99 | 100% OFF

Access a wide range of AI language models, both locally on your device and through cloud APIs. This app allows you to chat with open-source models, connect to your own hosted LLMs, or utilize services like OpenRouter for broad model access.

Local LLM supportOpenRouter integrationCustom backend connections
🔧 Utilities
(599)
free
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
(2M)
free with in-app purchases
7
OpenCat - AI Chat, Agent, MCP
OpenCat - AI Chat, Agent, MCP
OpenCat - AI Chat, Agent, MCP
Native AI Utilities
Free

This AI utility tool offers seamless integration of advanced AI models into your daily routine on Mac, iPhone, and iPad. It features a user-friendly interface, keyboard extensions for in-app AI access, and Siri/shortcut integration for automation. Supports a wide range of popular AI models and offers team deployment options.

Support for latest popular AI modelsKeyboard extensions for in-app AIRealistic voice synthesis
📊 Productivity
(835)
free with in-app purchases
8
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
(490K)
free with in-app purchases
9
Openchat: AI Chatbot Copilot
Openchat: AI Chatbot Copilot
Openchat: AI Chatbot Copilot
Image, Voice, Text Generation
Free

This AI assistant offers personalized text and voice interactions, helping with tasks like drafting emails, summarizing articles, and brainstorming creative ideas. It supports multilingual communication and includes an AI art generator and interactive games. Users can customize responses and focus on privacy.

Advanced AI AssistantPersonalized ResponsesSmart Task Automation
📊 Productivity
(4.4K)
free with in-app purchases
10
AI Chat Assistant • ChatAI Bot
AI Chat Assistant • ChatAI Bot
AI Chat Assistant • ChatAI Bot
Powered by ChatGPT API & GPT 4
Free

This AI-powered assistant helps with communication, learning, and creativity. It can generate text and images, assist with homework, translate languages, and even help with programming tasks. Get quick answers and improve your writing with this versatile digital companion.

Intelligent conversationImage generation from textEducational assistance
📊 Productivity
(238)
freemium
11
HTTPBot: API & HTTP Client
HTTPBot: API & HTTP Client
HTTPBot: API & HTTP Client
Make Requests, Debug APIs
Free

This app allows users to send HTTP/HTTPS requests and connect to WebSockets, making it easy to debug APIs on the go. It supports various response formats, collaboration features, and authentication methods, streamlining API development and testing.

Send HTTP/HTTPS and WebSocket requestsInspect JSON, HTML, and XML responsesImport/export Postman collections
🛠️ Developer Tools
(1.3K)
free with in-app purchases
12
Chat Unlimited & Ask Brutus AI
Chat Unlimited & Ask Brutus AI
Chat Unlimited & Ask Brutus AI
Powered by ChatGPT & GPT API
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
(1K)
free with in-app purchases
13
Prodigy — AI Chat Assistant
Prodigy — AI Chat Assistant
Prodigy — AI Chat Assistant
Chat with your api key
$3.99

This AI assistant provides a customizable chat experience with access to the latest OpenAI models and image generation capabilities. Users can leverage their own API keys for an ad-free, private interaction, with options for predefined or custom prompts.

Chat with AI modelsImage generationCustomizable prompts
📊 Productivity
(26)
free
14
ATOM: GPT Client & AI Chat Bot
ATOM: GPT Client & AI Chat Bot
ATOM: GPT Client & AI Chat Bot
Сhatbot powered by API
Free

This AI-powered chatbot acts as a personal assistant for work, learning, and socializing. It adapts to your conversation context, allowing for natural, multilingual interactions. Its intuitive interface makes accessing advanced AI capabilities easy and convenient.

Personalized AI adaptationNatural language conversation24/7 availability
🔧 Utilities
(2)
free
15
DeepSeek - AI Ассистент
DeepSeek - AI Ассистент
DeepSeek - AI Ассистент
Интеллектуальный AI-ассистент
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
16
Replit: Vibe Code with AI Fast
Replit: Vibe Code with AI Fast
Replit: Vibe Code with AI Fast
Apps, slides, websites, videos
Free

Build and deploy apps, websites, and games directly from your phone. Utilize AI to generate projects from natural language prompts, collaborate in real-time, and host your creations instantly with zero setup. Suitable for both beginners and experienced developers.

Build apps with natural language AIInstant zero-setup hostingReal-time multiplayer collaboration
🛠️ Developer Tools
(20K)
free with in-app purchases
17
Postmon - Rest API Client
Postmon - Rest API Client
Postmon - Rest API Client
HTTP API Client
Free

This app allows developers to build and test REST, HTTP, and SOAP APIs directly on their iPhone or iPad. It supports various request methods, authentication types, and body formats, with features for organizing requests and inspecting responses.

HTTP/HTTPS methods (GET, POST, PUT, DELETE, PATCH)Custom query parametersBasic, Bearer/JWT, OAuth authentication
🛠️ Developer Tools
(0)
freemium
18
Teste - API, Scripts, Terminal
Teste - API, Scripts, Terminal
Teste - API, Scripts, Terminal
Developer Workspace
Free

Test various APIs directly from your mobile device. Supports REST, GraphQL, WebSockets, and more, with advanced editors and request customization. Share requests easily and manage cookies and history.

Test REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS APIsPowerful GraphQL editor with query, mutation, subscription supportWebSocket testing tool for WS and WSS connections
🛠️ Developer Tools
(496)
free
19
Kimi - Kimi K3 is Live
Kimi - Kimi K3 is Live
Kimi - Kimi K3 is Live
K2.5·Visual·Agent·Code·Office
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
(4.7K)
freemium
20
AI Chatbot – Ask AI Anything
AI Chatbot – Ask AI Anything
AI Chatbot – Ask AI Anything
Built on OpenAI ChatGPT GPT-5
Free

This AI-powered writing assistant helps users craft content, generate ideas, and enhance their writing. It offers fast, accurate responses for essays, blogs, business communications, and more, making writing effortless and efficient.

AI Chatbot conversationsContent generation and proofreadingEssay and blog writing assistance
📚 Education
(150)
free with in-app purchases

FAQ about Openai Api

What are the best openai api apps for iPhone?
Claude by Anthropic tops our openai api apps ranking as of July 2026, with a 4.7-star average from 207K App Store ratings, and it's free to download.
Yes — 19 of the top openai api apps we rank are free to download, including Claude by Anthropic and Chat AI Plus.
Claude by Anthropic has no ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 235+ openai api apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Claude is an AI assistant designed to help users with a variety of tasks including writing, research, coding, and problem-solving. It can refine text, debug code, analyze data, and even interpret visual content like images and PDFs.
Key features include AI writing assistance for polishing content, AI coding support for development tasks, research capabilities with web search and data insights, and visual analysis of uploaded files. It also offers voice dictation for hands-free interaction and can integrate with Google Drive, Gmail, and Calendar.