Core vs SMSReader
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Core
This writing application is designed for serious Japanese writers, offering vertical text, manuscript management, and AI-powered editing and research. It syncs seamlessly with its Mac counterpart, allowing for on-the-go work with reliable source citation.
- AI editing partner
- AI research with real sources
- Vertical and horizontal text layout
- Export to multiple formats (PDF, DOCX, EPUB)
- Project management (corkboard, outliner)
- Syncs with Mac version
- Quick notes via widget
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A writing app for people who take Japanese writing seriously, now on iPhone and iPad. Vertical text, your manuscript, and the research, all in one place. Core brings drafting, reference, and revision into one workspace: an AI editing partner that has read your whole project, and reference search that returns only real sources. It opens the same projects as Core for Mac, so you can write at your desk and pick up where you left off on the go. ā AI Editor ā the partner that knows your work The AI has read your entire project. Ask it to evaluate an opening, sharpen a piece of dialogue, or test an idea against the rest of the manuscript. Unlike generic AI tools, it answers in the context of what you've actually written. ā AI Research Agent ā sources you can trust Ask the AI to find a citation. It searches scholarly databases such as the National Diet Library of Japan and returns only real sources, never fabricated references. ā A real writing editor ⢠Vertical and horizontal layout ⢠Ruby (furigana), emphasis dots, and upright numbers in vertical text ⢠Word count, 400-character manuscript-page count, and word goals ⢠Add photos and images to your manuscript or notes ā Export the way you want ⢠PDF with detailed control over page size, margins, and fonts, including spreads for binding and a colophon ⢠Copy in the formats of note, Kakuyomu, and Shosetsuka ni Naro, ready to paste ⢠Word (DOCX), EPUB, and plain text ⢠Preview before you export ā Project management ⢠Manuscript, notes, and reference material in one project ⢠Corkboard for chapter overview ⢠Outliner for building the plot ā Quick notes Start a note straight from the app icon or a widget. ā The same projects as on your Mac Open a project kept in iCloud Drive or another cloud folder on Mac, iPhone, and iPad alike. When changes from two devices overlap, Core takes care not to lose what you wrote. ā Your work stays with you Manuscripts are saved as files in a place you choose. Your text is never used to train AI models. ā Who it's for ā ⢠Japanese-language writers who need vertical typesetting that doesn't fight them ⢠Writers who want to keep going on their Mac manuscript while away from the desk ⢠Anyone who wants AI assistance without losing control of the manuscript ā Pricing ā Editing is free. AI features require a subscription. ⢠Pro plan: $7.99 / month, with a 14-day free trial ⢠Max plan: $26.99 / month If you already subscribe on Mac (App Store or direct), sign in with the same account and your plan carries over. ā Requirements ā ⢠iOS 17.0 / iPadOS 17.0 or later ⢠Internet connection required for AI features ā Support ā Email: contact@corewrite.app Privacy: https://corewrite.app/privacy Terms: https://corewrite.app/terms ā About the developer ā Core is built by a single developer who wanted a writing tool worth using session after session. Every feature ships only when it earns its keep in real writing sessions.
SMSReader
This app offers a fast and comfortable reading experience for digital books and documents. It supports various file formats, including PDFs and EPUBs, with advanced features for page turning, text display, and annotation. It also includes text-to-speech and translation capabilities.
- Fast page turning with multiple speeds
- Customizable reading experience
- Read Aloud text-to-speech
- Voice-controlled page turning
- Search and annotate documents
- Paragraph translation and summarization
- Organized bookshelf with cloud sync
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SMSReader is a reader for digital books and documents, built to be fast and comfortable. Even in a book of thousands of pages, the next page appears the moment you tap the edge, and holding the edge flips through pages at speed. BUILT FOR THE LATEST DEVICES ⢠The most comfortable PDF viewer on iPhone Duo ⢠Extensive accessibility support (VoiceOver and more) FAST PAGE TURNING ⢠Tap the left or right edge to turn the page instantly, or choose a slide animation ⢠Hold an edge to flip continuously (7 speeds, from 6 to 60 pages a second) ⢠Flick, drag the slider, or type a page number to move ⢠Pinch in to go straight to an overview of the pages EASY TO READ ⢠Home View: remembers, for each book, the area you want to zoom into, and keeps that zoom as you read on one view at a time. Scanned books with wide margins and two-column pages become easy to read ⢠Right to left (vertical Japanese), left to right, or top to bottom. Two-page spreads and a cover shown alone are set automatically from the PDF ⢠Tall pages fit the width of the screen, handy for PDF screenshots of websites EPUB ⢠Read reflowable and fixed-layout EPUBs, turning pages as fast as with PDFs ⢠Vertical Japanese, ruby, tate-chu-yoko and emphasis marks, in the book's own fonts if you like ⢠Choose the text size, font, margins, line spacing and paper for each book ⢠Press and hold an illustration to see it over the whole screen, and pinch to zoom. Pictures larger than the page are fitted to it LISTEN AND SPEAK ⢠Read Aloud: reads the text, leaving out running heads and page numbers, and follows the ruby in Japanese. The word being read is highlighted; start from any word, or move a paragraph back or forward ⢠Turn Pages by Voice: say "next", "previous" or "page 12". Speech is recognized on the device ⢠Siri and Shortcuts: "Continue reading in SMSReader", "Read aloud in SMSReader" and more SEARCH AND ANNOTATE ⢠Search the text of a book or of your whole library, without missing words split across lines, with your search history at hand ⢠Select text to copy, look up or share, including vertical text and text with ruby ⢠Pages without text, such as scanned books, are read on the device and can be searched, selected, translated and read aloud ⢠Annotate and highlight pages with Apple Pencil or your finger (iPadOS 26 or later). The PDF itself is never changed TRANSLATION AND SUMMARIES ⢠Open the translation panel beside the page to see a translation of each paragraph. Tap a paragraph to match the original and the translation ⢠For translation and summaries, use Apple Translate, Apple Intelligence (on device), or an online translation or AI service with your own API key BOOKSHELF ⢠Organize your library in folders, and folders within folders ⢠Keep the library on this device, in iCloud Drive, or in a folder the Files app can open, such as Dropbox. Books in the cloud are downloaded when you open them ⢠Drop a whole folder to import its PDFs and EPUBs ⢠Sync where you are, bookmarks, annotations, shelves and more across your devices with iCloud ⢠Join several books to read them on as one ⢠Password-protected PDFs open with their password ⢠Shelves, one for each shelf tag, work across folders, and a folder can be filtered by shelf tag ⢠Use any page or image as a cover. Books can also be hidden ⢠Lock the whole app or single books with a passcode and Face ID PRIVACY ⢠No ads, no account, no analytics ⢠Books, bookmarks, annotations and settings stay on your device; with sync on, they are kept in your own iCloud ⢠Text is sent to an outside service only when you have set your own API key, confirmed where it goes and agreed, and then run a translation or summary ⢠Text selection and AI features such as translation and summaries are off for PDFs that forbid copying For iPad and iPhone (Duo), iPadOS / iOS 18 or later (some features need 26 or later). The app can be shown in Japanese or English.
Screenshots
Verdict
The clearest difference is price: Core at Free against SMSReader's $9.99. SMSReader's advantage is in-app purchases (none vs 2). On review sentiment, ads, device support and iOS requirement there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Core is free to download; SMSReader costs $9.99 up front. Core sells 2 in-app purchases, starting at $6.99 per month. SMSReader asks for nothing beyond the download.
| Parameter | Core | SMSReader |
|---|---|---|
| Price | Free ā better | $9.99 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Update frequency | ā | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | No ā better |
| Monetization | Freemium ā better | Paid |
| Devices | iPhone, iPad, Mac ā better | iPhone, iPad |
| Requires iOS | 17.0 ā better | 18.0 |
| Further details ā not scored | ||
| Size | 11 MB | 14 MB |
| Age rating | 12+ | 4+ |
| Developer | Hukido | Kotatsu RIN |
Customer experience
Core
SMSReader
In-app purchases
Core
- Pro14 Days trial$6.991 Month
- Max$24.991 Month
SMSReader
No in-app purchases





