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Best AI Letter Writer Apps

235+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated July 2026

Every iPhone needs a few good ai letter writer apps. We benchmark 235+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top AI Letter Writer Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1ChatGPTChatGPTFree4.8★ (8.8M)YesYesJul 2026
2Chat AI - Ask AnythingChat AI - Ask AnythingFree4.8★ (126K)YesYesJul 2026
3AI Writer: Email Letter EssayAI Writer: Email Letter EssayFree4.8★ (6.5K)YesYesJul 2026
4Grammarly: AI Keyboard & NotesGrammarly: AI Keyboard & NotesFree4.7★ (220K)NoYesJul 2026
5AI Letter Writer & GeneratorAI Letter Writer & GeneratorFree4.8★ (13)NoYesJul 2026
6AI Chatbot Assistant - AI BotAI Chatbot Assistant - AI BotFree4.6★ (92)YesYesJul 2026
7TypeAI: AI Keyboard & WriterTypeAI: AI Keyboard & WriterFree4.7★ (19K)NoYesJul 2026
8ParagraphAI: Writer & KeyboardParagraphAI: Writer & KeyboardFree4.8★ (2.5K)YesYesJul 2026

Top Picks for AI Letter Writer

ChatGPT#1

ChatGPT by OpenAI OpCo, LLC

Your everyday AI assistant
Editor's Choice
📊 Productivity
4.8😊(8.8M 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
Chat AI - Ask Anything#2

Chat AI - Ask Anything by ElevenThirteen LLC

AI Chatbot & Essay Writer Bot
Strong Contender
📊 Productivity
4.8😊(126K 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

Room to Improve

  • 🐛 App crashes or becomes unavailable at times
  • 🔒 Limited free usage, requires paid subscription
  • 🔒 Frustrating when reaching daily usage limit
AI Writer: Email Letter Essay#3

AI Writer: Email Letter Essay by Tuling Network Limited

AI Keyboard, Writing Assistant
Worth Considering
🔍 Reference
4.8😊(6.5K ratings)
FreeAdsIn-App Purchases
AI Writer: Email Letter Essay screenshot 1
AI Writer: Email Letter Essay screenshot 2
AI Writer: Email Letter Essay screenshot 3
AI Writer: Email Letter Essay screenshot 4
AI Writer: Email Letter Essay screenshot 5
AI Writer: Email Letter Essay screenshot 6

This app assists with all your writing needs, from emails and essays to creative content. It offers AI-powered dictation, instant content generation, and a variety of templates to overcome writer's block and enhance your writing.

What We Love

  • 🚀 Helpful writing assistant
  • 👍 Useful for school, work, and personal writing
  • 💡 Generates creative ideas and content
  • 🚀 Fast and efficient

Room to Improve

  • 💰 Subscription/credits model can be expensive
  • 🐛 Occasional bugs and glitches
  • 🔋 Battery-intensive

More AI Letter Writer apps to explore

4
Grammarly: AI Keyboard & Notes
Grammarly: AI Keyboard & Notes
Grammarly: AI Keyboard & Notes
Write, dictate, edit, improve
Free

Enhance your writing across all apps with AI-powered suggestions for grammar, spelling, and clarity. Generate new versions of your text, detect tone, and improve conciseness. Also includes a document editor and Safari extension for comprehensive writing support.

Real-time grammar and spelling suggestionsAI-powered text rewritesTone detection and transformation
📊 Productivity
(220K)
freemium
5
AI Letter Writer & Generator
AI Letter Writer & Generator
AI Letter Writer & Generator
Cover, Legal & Business Letter
Free

Generate professional, personal, or creative letters in seconds using AI. Describe your needs and receive a perfectly crafted draft for any occasion, from legal documents to love letters. Save, share, and customize your writing with multi-language support.

AI-powered letter generationMultiple letter categoriesCustomizable tone and format
📊 Productivity
(13)
free with in-app purchases
6
AI Chatbot Assistant - AI Bot
AI Chatbot Assistant - AI Bot
AI Chatbot Assistant - AI Bot
Chatbot built on top Al models
Free

This AI-powered assistant helps users with a wide range of tasks, from writing content and generating ideas to answering questions and correcting grammar. It learns and adapts to your preferences over time for a more personalized experience.

Write content (tweets, emails, essays, code)Generate creative ideas (poems, songs)Answer questions based on knowledge
📊 Productivity
(92)
free with in-app purchases
7
TypeAI: AI Keyboard & Writer
TypeAI: AI Keyboard & Writer
TypeAI: AI Keyboard & Writer
Translate, Grammar Spell Check
Free

Enhance your mobile writing with an AI-powered keyboard. Get real-time grammar checks, word suggestions, translations, and AI chatbot assistance for any app. Improve your communication and express yourself clearly and effectively.

AI ChatbotEmail Writing AssistanceGrammar & Spelling Check (7 languages)
📊 Productivity
(19K)
free with in-app purchases
8
ParagraphAI: Writer & Keyboard
ParagraphAI: Writer & Keyboard
ParagraphAI: Writer & Keyboard
AI Writing: Email, Essay, Text
Free

This AI-powered writing tool helps you generate original content, draft emails, and summarize text in over 40 languages. It functions as a keyboard, allowing you to write and edit seamlessly within any app, ensuring clear and confident communication.

AI Text GeneratorAI Email WriterAI Writing Assistant
📊 Productivity
(2.5K)
free with in-app purchases
9
Friday AI Email Writer
Friday AI Email Writer
Friday AI Email Writer
PRO Letter, Mail & Text Writer
Free

This AI-powered writing assistant helps you craft better emails, letters, and messages. It offers personalized suggestions, proofreading, and grammar checking to enhance your writing speed and efficiency. Ideal for students, professionals, and anyone seeking to improve their communication.

AI-powered writing suggestionsProofreading and grammar checkingLetter and email composition
📊 Productivity
(9.6K)
free with in-app purchases
10
Chatbot AI: AI Chat Assistant
Chatbot AI: AI Chat Assistant
Chatbot AI: AI Chat Assistant
AI Chat & Image Generator
Free

Access multiple advanced AI models, including GPT-5, Claude, Grok, Gemini, and DeepSeek, in a single application. Generate text, create images, get help with tasks, and translate languages with intelligent assistance.

Access to GPT-5, Claude, Grok, Gemini, DeepSeekAI-powered text generationImage generation from descriptions
📊 Productivity
(6K)
free with in-app purchases
11
AI Paragraph Writer, AI Letter
AI Paragraph Writer, AI Letter
AI Paragraph Writer, AI Letter
AI Content Writer & Research
Free

Effortlessly generate various types of written content, from blogs and theses to social media posts and summaries. This AI-powered tool enhances your writing experience and boosts productivity with personalized style adaptation and efficient content creation.

Smart blogging with idea generationThesis structuring and referencingSocial media post creation
📊 Productivity
(15)
free with in-app purchases
12
AI+ Chat & Al Video Generator
AI+ Chat & Al Video Generator
AI+ Chat & Al Video Generator
Chatbot Homework Helper ChatAI
Free

Access multiple advanced AI models for work, school, and personal tasks. Get help with writing, learning, brainstorming, and even creative projects. Offers AI video generation and text-to-speech capabilities.

Access multiple AI modelsWork assistance (email, copywriting, proposals)School assistance (tutor, essay writer)
📊 Productivity
(19K)
freemium
13
AI Writer AI Writing Assistant
AI Writer AI Writing Assistant
AI Writer AI Writing Assistant
Essay Novel Letter Book Story
Free

This app leverages advanced AI to help users generate various types of written content, from essays and stories to messages and song lyrics. It offers customizable writing styles and tones to suit different needs, acting as a creative partner to overcome writer's block and enhance productivity.

Generate creative contentSuggests contextually relevant sentencesBreak through writer's block
🔍 Reference
(293)
freemium
14
Chat Smith: AI Chatbot & Agent
Chat Smith: AI Chatbot & Agent
Chat Smith: AI Chatbot & Agent
Study, Writing, Research Agent
Free

This AI assistant offers advanced capabilities for writing, research, and image generation. It leverages multiple powerful AI models to provide deep insights, create content, and simplify tasks. Ideal for students, professionals, and creatives seeking enhanced productivity.

AI Image GeneratorAI Writing AssistantDeep Research with Sources
📊 Productivity
(167K)
free with in-app purchases
15
AI Email Writer: Letter Writer
AI Email Writer: Letter Writer
AI Email Writer: Letter Writer
Ai Letter Writer, Email Writer
Free

This AI-powered assistant helps you craft professional emails and replies with intelligent features. It offers tools for tone, language, length, grammar correction, and summary creation to boost productivity and save time.

AI-powered email draftingInstant email repliesCustomizable tone, language, and length
📊 Productivity
(3)
subscription
16
AI Writer - Writing Assistant
AI Writer - Writing Assistant
AI Writer - Writing Assistant
Smart Chatbot Powered by GPT 5
Free

This AI-powered writing assistant helps you generate various types of text, from essays and emails to creative content and code. It also offers web search, summarization, translation, and grammar correction to enhance your writing and research process.

AI writing assistant for essays, emails, blogsAI search mode for real-time web answersSummarizer and rewriter for text
📊 Productivity
(1.1K)
free with in-app purchases
17
AI Email Writer: Lazy Mail
AI Email Writer: Lazy Mail
AI Email Writer: Lazy Mail
Type, Reply, Correct Any Text
Free

This AI-powered app enhances your writing with personalized suggestions, customizable tone, and text length. It helps you compose letters, improve messaging skills, and proofread text for error-free results. Ideal for professionals, students, and anyone looking to elevate their writing.

AI-powered writing suggestionsCustomizable tone and lengthPre-made prompt templates
📊 Productivity
(195)
free with in-app purchases
18
Wordtune: AI Writing Keyboard
Wordtune: AI Writing Keyboard
Wordtune: AI Writing Keyboard
AI Writing App & Paraphrasing
Free

This AI-powered writing assistant helps you express yourself more clearly and authentically. It offers suggestions to rephrase text, generate new content, and adjust the tone and length of your writing. It works across multiple platforms, making it a versatile tool for various communication needs.

AI-powered text rewritingGenerate sentences and paragraphsAdjust tone and length
📊 Productivity
(960)
free with in-app purchases
19
ChatBox - AI 챗봇과 채팅 및 이미지 생성
ChatBox - AI 챗봇과 채팅 및 이미지 생성
ChatBox - AI 챗봇과 채팅 및 이미지 생성
사진 생성과 한국어 글쓰기를 위한 최고의 Al 모델
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
20
AI Chatbot
AI Chatbot
AI Chatbot
AI Chat, open, assistant, pro
Free

This app offers an advanced AI-powered chat and writing assistant. It understands natural language for real-time conversations and helps craft professional emails, messages, and other written content with ease and precision.

AI chat bot for natural language conversationsReal-time responsesWriting assistant for emails and messages
📊 Productivity
(2.8K)
free with in-app purchases

FAQ about AI Letter Writer

What are the best ai letter writer apps for iPhone?
ChatGPT tops our ai letter writer apps ranking as of July 2026, with a 4.8-star average from 8.8M App Store ratings, and it's free to download.
Yes — 20 of the top ai letter writer apps we rank are free to download, including ChatGPT and Chat AI - Ask Anything.
ChatGPT shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 235+ ai letter writer apps on the iOS App Store as of July 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.

Related searches

free ai letter writerai letter writer & generator