MiiTrans vs GrainBook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MiiTrans
This AI-powered tool offers instant translations for text, voice, images, and documents. It features a chat-style interface, comparative translation options, and robust offline capabilities. Seamlessly integrate it into your system for cross-language communication and learning.
- AI-powered translation
- Text, voice, image, and document translation
- Offline translation capabilities
- Comparative translation engine
- Interactive chat-style interface
- iCloud sync across devices
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MiiTrans is your ultimate AI-powered translation companion that breaks down language barriers effortlessly. Combining cutting-edge AI technology with robust offline capabilities, it delivers lightning-fast, accurate translations for text, voice, images, and documents—empowering seamless cross-language communication, learning, and global collaboration. ◎ Interactive Translation - Chat-style interface that makes translation feel like natural conversation. - Instantly read aloud, copy, or share original, translated, or bilingual text. - Smart text segmentation by paragraph, sentence, or word for deeper understanding. - Save favorites, edit translations, and retranslate with just one tap. ◎ Comparative Translation - Compare multiple languages and translation engines side by side instantly. - Choose the most accurate, natural, and contextually perfect translation. - Essential tool for professionals demanding translation excellence. ◎ Default Translation App - Set MiiTrans as your default translation app on iPhone and iPad. - Translations triggered from Safari, any app, or Siri automatically use MiiTrans. - Deeply integrated into iOS for a seamless, system-wide translation experience. ◎ Image Translation - Extract and translate any text from photos using state-of-the-art OCR. - Snap with camera, import from gallery, select files, or share from any app. - Copy text, save images, or export translated results instantly. ◎ Document Translation - Precisely translate any selected text from PDF files—perfect for research. - Translate Markdown files while maintaining perfect formatting and structure. - Handle subtitle files (LRC, SRT) with intact timestamps for video localization. - More document formats continuously added based on user needs. ◎ Smart Word Lookup - Get pronunciation, definitions, explanations, and authentic example sentences instantly. - Auto-extract words from translations with AI-powered contextual explanations. - Build and grow your personal vocabulary library for lifelong learning. ◎ AI Text Polishing - Transform rough translations into polished, professional-grade content. - Enhance clarity, flow, and impact to captivate your audience. - Perfect for business communications, academic papers, and creative writing. ◎ Seamless iCloud Sync - Sync translations, images, and documents across all your devices in real-time. - Automatic backup ensures your entire translation history is never lost. - Enjoy a unified, seamless experience on iPhone, iPad, and Mac. ◎ AI & Offline Power - Switch effortlessly between AI-powered and offline translation modes. - Pre-configured AI providers and models ready to use, plus full customization. - Download language packs for offline translation—secure, private, reliable. Love MiiTrans? Upgrade to Premium and unlock unlimited access to custom AI translation, side-by-side comparison, image & document translation, plus seamless iCloud sync across iPhone, iPad, and Mac. Privacy Policy: https://www.miidee.com/miitrans/privacy-policy Terms of Use: https://www.miidee.com/miitrans/terms-of-use
GrainBook
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Turn every video, podcast, newsletter, and article you follow into a searchable AI knowledge feed. GrainBook brings your subscriptions together, summarizes new content, and lets you ask questions grounded in the sources you trust. Spend less time scrolling and keep more of what matters. Join 3,000+ active readers who use GrainBook to learn from the internet without drowning in it. ONE FEED FOR EVERYTHING YOU FOLLOW • Follow or save content from YouTube, podcasts, Bilibili, X/Twitter, Reddit, RSS, newsletters, ebooks, and web pages • See new releases in one calm, personalized feed • Discover creators worth following across topics you care about AI SUMMARIES THAT SAVE TIME • Turn long videos, podcast episodes, and articles into clear summaries • Choose the depth you need—from a quick take to a deeper read or transcript • Start your day with a digest of unread updates from yesterday ASK YOUR KNOWLEDGE • Ask questions across your subscriptions, notes, collections, and saved content • Use @ to focus GrainBook AI on a creator, source, collection, note, or individual item • Get answers grounded in your content, with citations that open the original source • Ask AI while reading, then continue the conversation in Chat SAVE WHAT MATTERS • Save important insights and organize them with collections and tags • Search your library and revisit your reading history • Keep every original source one tap away HOW IT WORKS 1. Subscribe to a source or save a link 2. GrainBook fetches, transcribes, and summarizes new content 3. Read the essentials, ask follow-up questions, and save what matters Start free and turn information overload into a knowledge habit. GrainBook offers optional auto-renewing subscriptions. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. Terms: https://grainbook.app/terms Privacy: https://grainbook.app/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: GrainBook at 16.4 against MiiTrans's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. MiiTrans sells 2 one-off in-app purchases and GrainBook sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 5, 2026 and October 12, 2026 respectively.
| Parameter | MiiTrans | GrainBook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (28 ratings) — better | — |
| Positive reviews | 78.8% of reviews | — |
| Number of ratings | 28 — better | — |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.0 | 16.4 — better |
| Further details — not scored | ||
| Size | 25 MB | 155 MB |
| Age rating | 4+ | 17+ |
| Developer | 宏基 庄 | Yuan Long |
In-app purchases
MiiTrans
- MiiTrans ProFree
- MiiTrans Pro$6.99
GrainBook
- Grainbook Go (1-Month)14 Days trial$4.991 Month
- Grainbook Go (12-Months)14 Days trial$44.991 Year









