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Best Claude Sonnet 4 Apps

55+ iOS apps curated and reviewed

4.7 avg rating
18 free apps
Updated May 2026

Finding the right claude sonnet 4 app can be overwhelming with so many options. We've analyzed 55+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.

Top Picks for Claude Sonnet 4

Claude by Anthropic#1

Claude by Anthropic by Anthropic PBC

AI assistant for life and work
Editor's Choice
πŸ“Š Productivity
4.7😊(181K ratings)
FreeAdsIn-App Purchases
#2in Productivity
Claude by Anthropic screenshot 1
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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

  • πŸš€ Powerful and versatile AI assistant
  • πŸ‘ Intuitive and easy to use interface
  • πŸ’‘ Innovative features like 'Projects'
  • πŸ€– Intelligent and thoughtful responses

Room to Improve

  • πŸ”’ Concerns about privacy and data usage
  • 🚫 Limitations on free usage and throttling
  • πŸ› Occasional bugs and crashes
ChatPlus: AI Chatbot Assistant#2

ChatPlus: AI Chatbot Assistant by Best mobile app, MB

Powered by GPT-5.2 & DALL-E 3
Strong Contender
πŸ“Š Productivity
4.8😞(86 ratings)
FreeAdsIn-App Purchases
ChatPlus: AI Chatbot Assistant screenshot 1
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ChatPlus: AI Chatbot Assistant screenshot 6

This AI-powered assistant leverages advanced language models and image generation tools to enhance productivity and creativity. It offers real-time data, multilingual support, and assistance with writing, learning, and content creation.

What We Love

  • ⭐ Amazing AI capabilities
  • 🎨 Excellent image generation
  • πŸ€– Outshines ChatGPT
  • πŸ’° Good value for money

Room to Improve

  • πŸ› Frequent bugs and crashes
  • πŸ€” Inconsistent performance
  • πŸ€– Not as capable as advertised
ChatGPT#3

ChatGPT by OpenAI OpCo, LLC

The official app by OpenAI
Worth Considering
πŸ“Š Productivity
4.8😊(8.1M ratings)
FreeAdsIn-App Purchases
#1in Productivity
ChatGPT screenshot 1
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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

  • πŸš€ Powerful and versatile AI assistant
  • πŸ‘ Intuitive and user-friendly interface
  • πŸ€– Impressive conversational abilities
  • πŸ’‘ Convenient mobile access to ChatGPT

Room to Improve

  • πŸ› Occasional inaccuracies or inconsistencies in responses
  • πŸ”– Limited to pre-2021 data, lacking real-time updates
  • πŸ”’ Concerns about privacy and data usage

More Claude Sonnet 4 apps to explore

4
ChatPub: All-In-One AI Chat
ChatPub: All-In-One AI Chat
ChatPub: All-In-One AI Chat
Powered by ChatGPT & GPT-4o
Free

Access multiple advanced AI models for tasks like writing, image generation, and problem-solving. Get instant answers, summarize content, and chat with AI companions. Offers specialized assistants for various needs.

AI Image GeneratorImage RecognitionReal-time Search
πŸ“Š Productivity
(625)
free with in-app purchases
5
Sider: AI GPT Deep Chat
Sider: AI GPT Deep Chat
Sider: AI GPT Deep Chat
Top AI Models All in One.
Free

This AI assistant offers access to multiple advanced language models for tasks like summarization, writing, image generation, and homework help. It also functions as a knowledge base, allowing users to chat with documents and websites, and engage with diverse AI characters.

Access to multiple top AI modelsSummarize documents and articlesGenerate creative images from text
πŸ“Š Productivity
(4.1K)
free with in-app purchases
6
Spine Sonnet
Spine Sonnet
Spine Sonnet
by jody zellen
Free

This app automatically generates 14-line sonnets using titles from a large archive of art and architectural theory books. It creates unique poems in the style of found poetry.

Automatic sonnet generationFound poetry styleArchive of 2500+ book titles
🎬 Entertainment
(6)
free
7
ChatGro - AI Assistant
ChatGro - AI Assistant
ChatGro - AI Assistant
4o, 4.0, o1, opus, sonnet
Free

Engage in intelligent conversations and get assistance with a wide range of tasks. This AI assistant supports multiple advanced models, voice input, and streaming outputs for a seamless experience. Explore role-playing with over 60 characters and get help with writing, planning, and more.

Advanced AI models (4o, 4.0, etc.)Voice input and streaming outputsContext association and segmentation
πŸ“Š Productivity
(7)
free with in-app purchases
8
CLAI Chinese Offical
CLAI Chinese Offical
CLAI Chinese Offical
by Yuhsin Tech Limited
Free
πŸ”§ Utilities
(0)
9
Shakespeare
Shakespeare
Shakespeare
The #1 Shakespeare App
Free

Access the complete works of Shakespeare, including plays, sonnets, and poems. Features include a powerful search, integrated glossary, note-taking, and customization options for a rich reading experience.

Complete works of ShakespearePowerful search and concordanceIntegrated glossary with definitions
πŸ“š Education
(3.3K)
free with in-app purchases
10
Vefxistyaosani
Vefxistyaosani
Vefxistyaosani
by KJ Education Ltd
Free

Explore and understand the ancient Georgian poem "The Man in the Panther's Skin." Features include side-by-side modern and old Georgian text, chapter summaries, and a collection of aphorisms sorted by theme.

Side-by-side old and modern Georgian textShort chapter summariesCollection of aphorisms sorted by theme
πŸ“š Education
(944)
free
11
Grok - AI Chat & Video
Grok - AI Chat & Video
Grok - AI Chat & Video
The real-time AI assistant
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
πŸ“Š Productivity
(1.3M)
free with in-app purchases
12
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
πŸ“Š Productivity
(11K)
free
13
Shakespeare Pro
Shakespeare Pro
Shakespeare Pro
The #1 Shakespeare App
$12.99

Access the complete works of Shakespeare, including plays, sonnets, and poems. Features include a searchable concordance, integrated glossary, note-taking and sharing capabilities, and customizable reading options. Explore character details, historical context, and original spellings.

Complete works of ShakespeareSearchable concordanceIntegrated glossary with definitions
πŸ“š Education
(1.5K)
free with in-app purchases
14
Jarvis - Your ai assistant
Jarvis - Your ai assistant
Jarvis - Your ai assistant
by δΊ‘ι£ž 李
Free

Connect to multiple advanced AI models like ChatGPT, Gemini, and Claude in one place. Get expert answers for learning, work, and daily tasks without needing separate subscriptions. Experience flexible, pay-as-you-go AI intelligence.

Connect to ChatGPT, Gemini, and ClaudeAccess advanced AI modelsPay-as-you-go intelligence
πŸ“Š Productivity
(1)
free with in-app purchases
15
Poemhunter
Poemhunter
Poemhunter
Best Poems by Best Poets
Free

Access a vast digital library of over 1.4 million poems from more than 100,000 poets worldwide. Discover new verses, search for specific works or authors, and share your favorite poems with ease. This app offers a continuous stream of literary treasures for poetry enthusiasts.

Vast archive of poems and poetsRandom poem generatorSearch for poems and poets
πŸ” Reference
(8.4K)
free with in-app purchases
16
AI Expert - Chatbot Assistant
AI Expert - Chatbot Assistant
AI Expert - Chatbot Assistant
Your Al Helper for Any Task
Free

This AI-powered assistant offers a wide range of capabilities, from writing and coding help to personalized suggestions for entertainment and career advancement. It acts as a versatile companion for learning, social media, business, and more, providing expert guidance for various tasks.

AI-powered writing and grammar correctionContent generation and summarizationCoding and math problem solving
πŸ“Š Productivity
(2K)
free with in-app purchases
17
Drops for Claude Code
Drops for Claude Code
Drops for Claude Code
First to know. First to ship.
Free
πŸ› οΈ Developer Tools
(2)
18
Use for AI Chatbot
Use for AI Chatbot
Use for AI Chatbot
Powered by OpenAI & ChatGPT
Free

Engage in natural language conversations with an AI virtual assistant and generate unique artwork using advanced AI. Personalize creations by adding your own photos to diverse art styles.

AI-powered virtual assistant for conversationsGenerate unique AI artSelect from various art styles
πŸ’Ό Business
(1.9K)
free with in-app purchases
19
Conjuu - French Conjugation
Conjuu - French Conjugation
Conjuu - French Conjugation
Learn French verb conjugation!
Free

Master French verb conjugations with this app. It offers customizable tests for all tenses and verb forms, including irregular verbs. Improve your spelling, pronunciation, and recall for confident French communication.

Learn irregular verb forms, accents, and spellingsOver 600 common verbs with full conjugation tablesPersonalizable verb and tense selection
πŸ“š Education
(696)
free with in-app purchases
20
Shakespeare - Complete Search
Shakespeare - Complete Search
Shakespeare - Complete Search
by 俊 姜
$1.99
$2.99 | 33% OFF

Access the complete works of William Shakespeare offline. Easily search for specific words and phrases within plays, sonnets, and poems. Customize text appearance and manage your files within the application.

Complete works of ShakespeareOffline accessWord search functionality
πŸ“š Books
(0)
paid