Best Natural Language Processing App

0+ iOS apps curated and reviewed

4.6 avg rating
20 free apps
Updated June 2026

Out of 0+ natural language processing app on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Natural Language Processing App (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1NaturalReader - Text To SpeechNaturalReader - Text To SpeechFree4.6★ (8.8K)NoYesAug 2026
2Peech: Text to Speech ReaderPeech: Text to Speech ReaderFree4.5★ (8.2K)NoYesAug 2026
3Quillbot-AI Writing & KeyboardQuillbot-AI Writing & KeyboardFree4.7★ (2.9K)NoYesAug 2026
4Wispr Flow: AI Voice KeyboardWispr Flow: AI Voice KeyboardFree4.8★ (14K)NoYesAug 2026
5Grammarly: AI Keyboard & VoiceGrammarly: AI Keyboard & VoiceFree4.7★ (221K)NoYesAug 2026
6AI Chatbot - Ask Me AnythingAI Chatbot - Ask Me AnythingFree4.6★ (16K)YesYesAug 2026
7Chatbot App: AI AssistantChatbot App: AI AssistantFree4.2★ (3.9K)NoYesAug 2026
8Voice Dream - Natural ReaderVoice Dream - Natural ReaderFree4.5★ (14K)YesYesAug 2026

Top Picks for Natural Language Processing App

NaturalReader - Text To Speech#1

NaturalReader - Text To Speech by NaturalSoft Limited

#1 Popular TTS APP
Editor's Choice
📊 Productivity
4.6😊(8.8K ratings)
FreeIn-App Purchases
NaturalReader - Text To Speech screenshot 1
NaturalReader - Text To Speech screenshot 2
NaturalReader - Text To Speech screenshot 3
NaturalReader - Text To Speech screenshot 4
NaturalReader - Text To Speech screenshot 5
NaturalReader - Text To Speech screenshot 6

This app transforms text from various sources, including documents, web pages, and images, into natural-sounding spoken audio. It offers a wide selection of AI voices and languages, with features designed to enhance the listening experience and assist users with reading difficulties.

What We Love

  • 👍 Great app to save time
  • 🚀 Helps with reading and comprehension
  • 💡 Useful for dyslexic users
  • 👍 Excellent text-to-speech quality

Room to Improve

  • 💰 Subscription is considered expensive
  • 🐛 Occasional mispronunciations and pausing issues
  • 🐛 Compatibility issues with certain document formats
Peech: Text to Speech Reader#2

Peech: Text to Speech Reader by Dopefin Limited

Listen to Books, PDFs and Web
Strong Contender
📊 Productivity
4.5😐(8.2K ratings)
FreeIn-App Purchases
Peech: Text to Speech Reader screenshot 1
Peech: Text to Speech Reader screenshot 2
Peech: Text to Speech Reader screenshot 3
Peech: Text to Speech Reader screenshot 4
Peech: Text to Speech Reader screenshot 5
Peech: Text to Speech Reader screenshot 6

Transform any text into lifelike audiobooks with an AI-powered reading companion. Scan physical books, PDFs, or web articles to listen on the go, with natural-sounding voices and high-speed playback. Supports over 60 languages.

What We Love

  • 🚀 Perfect for scanning books and having them read aloud
  • 🚀 Supports multiple languages
  • 🚀 Allows following along with highlighted text
  • 👍 Helpful for students and university

Room to Improve

  • 🐛 Issues with organizing files and folders
  • 🐛 No option to switch between old and new voices
  • 🐛 Unable to retrieve deleted files
Quillbot-AI Writing & Keyboard#3

Quillbot-AI Writing & Keyboard by QuillBot, a Learneo Inc. business

Paraphrase & Grammar Check App
Worth Considering
📊 Productivity
4.7😐(2.9K ratings)
FreeIn-App Purchases
Quillbot-AI Writing & Keyboard screenshot 1
Quillbot-AI Writing & Keyboard screenshot 2
Quillbot-AI Writing & Keyboard screenshot 3
Quillbot-AI Writing & Keyboard screenshot 4
Quillbot-AI Writing & Keyboard screenshot 5
Quillbot-AI Writing & Keyboard screenshot 6

Enhance your writing with an AI-powered assistant that offers paraphrasing, grammar correction, and translation. Generate ideas, detect AI-written content, and create images directly from your device. Improve communication and overcome writer's block with this versatile tool.

What We Love

  • 🚀 Helpful paraphrasing tool
  • 👍 Convenient keyboard integration
  • 💡 Useful for writing and editing
  • 👍 Improves writing quality

Room to Improve

  • 🐛 Buggy keyboard and app performance
  • 🔒 Difficult to cancel subscription
  • 👎 Limited features compared to website

More Natural Language Processing App apps to explore

4
Wispr Flow: AI Voice Keyboard
Wispr Flow: AI Voice Keyboard
Wispr Flow: AI Voice Keyboard
Voice dictation & quick notes
Free

This AI-powered voice keyboard transforms your spoken words into polished text instantly, working seamlessly across all your favorite apps. It refines your dictation for speed and accuracy, eliminating filler words and autocorrect errors. Capture notes, draft messages, or transcribe ideas effortlessly, all while sounding natural.

AI-powered voice dictationWorks in any appPolished, formatted output
📊 Productivity
(14K)
free with in-app purchases
5
Grammarly: AI Keyboard & Voice
Grammarly: AI Keyboard & Voice
Grammarly: AI Keyboard & Voice
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
(221K)
freemium
6
AI Chatbot - Ask Me Anything
AI Chatbot - Ask Me Anything
AI Chatbot - Ask Me Anything
Top AI tools in one app
Free

This intelligent virtual assistant uses AI to understand your requests and provide helpful information. It can answer questions, write content, translate languages, solve math problems, generate images, and summarize documents. Access multiple top AI models for a comprehensive experience.

Answer questionsWrite emails, papers, essaysCompose stories and poems
📊 Productivity
(16K)
freemium
7
Chatbot App: AI Assistant
Chatbot App: AI Assistant
Chatbot App: AI Assistant
AI Agent, Chat & Image Maker
Free

Access multiple advanced AI models like ChatGPT, Gemini, and Claude in a single, user-friendly application. Engage in real-time voice chats, generate images, get expert insights, and receive personalized coaching for various aspects of your life.

Real-time voice chatInteractive explanations and visualized answersAI-powered travel planning
📊 Productivity
(3.9K)
freemium
8
Voice Dream - Natural Reader
Voice Dream - Natural Reader
Voice Dream - Natural Reader
Text to Speech - Read Aloud
Free

Transform digital and scanned text into natural-sounding speech with advanced AI. Listen to PDFs, web pages, emails, and books with customizable voices and reading styles. Supports numerous document formats and cloud services.

AI Text-to-SpeechSupports PDF, Web, Email, eBooksCustomizable voices and languages
📚 Education
(14K)
free with in-app purchases
9
SpeakApp AI: Voice Notes
SpeakApp AI: Voice Notes
SpeakApp AI: Voice Notes
Transcribe speech to text
Free

This app transforms your spoken words into accurate, ready-to-use text. It can transcribe meetings, voice notes, and even import audio from other sources. AI features allow for summarization, tone adjustment, and translation.

Voice to text transcriptionReal-time recording and transcriptionImport audio from files and apps
📊 Productivity
(8.8K)
free with in-app purchases
10
AI Chatbot - Ask AI Anything‎
AI Chatbot - Ask AI Anything‎
AI Chatbot - Ask AI Anything‎
Built on GPT-5.5
Free

This app provides a sophisticated conversational experience by leveraging advanced language models like ChatGPT, Grok, and Claude. It understands natural language and generates human-like responses for a wide range of topics and tasks. Features include email automation, document generation, and visual analysis.

Conversational AI assistantEmail reply automationDocument content generation
📊 Productivity
(158)
free with in-app purchases
11
ChatGenius - AI Chat, ChatBot
ChatGenius - AI Chat, ChatBot
ChatGenius - AI Chat, ChatBot
Smart Assistant & AI Writer
Free

This AI-powered companion utilizes the GPT-5.1 API to offer advanced chatbot interactions, creative writing assistance, and research tools. It also includes code generation, smart editing, and speech-to-text capabilities, making daily tasks more productive and enjoyable.

Advanced AI chatbot interactionsPoetry and social media post generationResearch and concept explanation
📊 Productivity
(4.3K)
free with in-app purchases
12
EF Hello Speak: Learn English
EF Hello Speak: Learn English
EF Hello Speak: Learn English
Pronunciation & Listening
Free

Practice English conversation with an AI tutor that provides instant feedback on pronunciation, grammar, and fluency. Engage in short, personalized lessons designed for real-life scenarios, helping you build confidence for work, study, or travel.

AI English Tutor (Addi)Real-time pronunciation and grammar feedbackBite-sized 5-minute learning sessions
📚 Education
(9.3K)
free with in-app purchases
13
Fortelling - Story Writing App
Fortelling - Story Writing App
Fortelling - Story Writing App
Book & novel: world plotting
Free

This app helps novelists plot and write their books by organizing story elements like characters, locations, and items. It offers tools for world-building, real-time collaboration, and writing statistics, along with weekly challenges to inspire creativity.

Advanced plotting toolsWorld-building for fictional universesStory element organization
📊 Productivity
(1K)
free with in-app purchases
14
Shadowsearch: AI Assistant
Shadowsearch: AI Assistant
Shadowsearch: AI Assistant
Chatbot, Writer & Assistant
Free

This AI-powered assistant simplifies online people searches by scanning multiple platforms simultaneously. Discover social media profiles, publicly available records, and other relevant online information quickly and efficiently from a single interface.

AI-powered people searchSocial media profile lookupCross-platform discovery
🌟 Lifestyle
(3.8K)
freemium
15
DeepSearch - AI Chatbot App
DeepSearch - AI Chatbot App
DeepSearch - AI Chatbot App
Chatbot built on top Al models
Free

This AI-powered chatbot provides quick, informative answers to any question and assists with various writing tasks, from stories to articles. It offers a user-friendly interface and saves your chat history for easy access.

Answer any questionWrite any type of articleCreative and logical answers
📊 Productivity
(423)
free with in-app purchases
16
Genora AI – Chat Bot Assistant
Genora AI – Chat Bot Assistant
Genora AI – Chat Bot Assistant
Built on GPT-5, Claude, Gemini
Free

This AI assistant combines conversational intelligence with real-time search to help you work, learn, and create. It offers advanced chat capabilities with multiple AI models, visual search analysis, and voice input for enhanced productivity.

Multiple AI model selectionReal-time search with verified sourcesAI image and document analysis
📊 Productivity
(9.5K)
free with in-app purchases
17
Natural Write - Humanize AI
Natural Write - Humanize AI
Natural Write - Humanize AI
Humanizer ai - bypass detector
Free

This app helps you rephrase sentences, rewrite paragraphs, and bypass AI detectors. It offers intelligent rewriting with multiple modes and an integrated AI detector to ensure your text sounds natural and human-like.

Intelligent paraphrasing and rewritingBuilt-in AI detector checkBypass and pass AI detectors
📊 Productivity
(110)
free with in-app purchases
18
LookUp: English Dictionary App
LookUp: English Dictionary App
LookUp: English Dictionary App
Vocabulary Builder & Thesaurus
Free

Enhance your English vocabulary with a daily word, interactive quizzes, and a comprehensive dictionary. Features include visual learning aids, audio pronunciations, and translations to over 20 languages. Ideal for learners and word enthusiasts.

Daily Word of the Day with illustrationsComprehensive English Dictionary & ThesaurusAudio pronunciations and example sentences
🔍 Reference
(3.1K)
free with in-app purchases
19
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Word of the day widget & games
Free

Expand your vocabulary with daily word learning and engaging games. This app offers customizable learning paths and difficulty levels to suit your English proficiency. Make vocabulary acquisition a fun and effective part of your routine.

Learn new words dailyCustomizable difficulty levelsSelect vocabulary categories
📚 Education
(214K)
free with in-app purchases
20
Flip-App
Flip-App
Flip-App
AI-native employee app
Free

This platform connects your entire organization with company news, secure chat, HR tools, and AI-powered features. It offers personalized content, automated workflows, and real-time translation, all within a secure, branded mobile app.

Personalized newsfeedSecure chat, voice, and video callsHR self-service tools
💼 Business
(3)
freemium

FAQ about Natural Language Processing App

What is the best natural language processing app for iPhone?
NaturalReader - Text To Speech tops our natural language processing app ranking as of June 2026, with a 4.6-star average from 8.8K App Store ratings, and it's free to download.
Yes — 20 of the top natural language processing app we rank are free to download, including NaturalReader - Text To Speech and Peech: Text to Speech Reader.
NaturalReader - Text To Speech has no ads and offers in-app purchases, according to its App Store listing as of June 2026.
NaturalReader is a text-to-speech application that reads aloud various types of text content. It can process documents like PDFs, online articles, cloud files, and even text captured from images using your device's camera. The app aims to make reading more accessible and convenient by converting written words into spoken audio.
Key features include a camera scanner for converting physical text to audio, a wide selection of over 200 AI-powered voices across more than 99 languages and dialects, and the ability to convert text into downloadable MP3 files. It also offers OCR text recognition, AI text filtering to remove distractions, and customizable options like reading speed, voice selection, and dyslexia-friendly fonts.