UD Browser vs GRAPES
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UD Browser
This app enhances reading accessibility with universal design principles. It supports various e-book formats, offers OCR for digitizing documents, and includes features like text-to-speech and zoom for comfortable use by everyone.
- Universal design for accessibility
- Supports EPUB, DAISY, PDF, HTML
- OCR for digitizing paper documents
- Text-to-speech functionality
- Keyboard navigation
- Zoom display and reflow layout
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UD Browser is an e-book reading application developed based on universal design principles, with a strong focus on enhancing reading accessibility. This application allows users to switch between fixed layouts (PDF) and reflow layouts (HTML), while supporting a wide range of e-book formats, including EPUB and DAISY. Designed for comfortable use by anyone, it features an OCR function, zoom display, keyboard navigation, dictionary search, and text-to-speech capabilities. The intuitive, easy-to-navigate menus and text selection functions ensure that individuals with low vision can confidently use the app. Additionally, the OCR and file conversion functions enable quick digitization of paper documents. Ideal for use in educational settings, workplaces, and at home, this app is a powerful tool for supporting learning and information sharing. This application was developed under contract with the Yasushi Nakano Laboratory at Keio University and was completed with research funding from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) and the Japan Society for the Promotion of Science (JSPS) (Grant Numbers: 16H02072, 19H00623, 22H00081). Application Features - Easy-to-use interface with large, readable menus - Dictionary search and text-to-speech functionality - Page jump feature for quick navigation - Support for keyboard operations - Reflow display that maintains readability when text is enlarged - Conversion functionality for text files, Word files, and PDF files - OCR functionality for digitizing paper documents - Compatibility with EPUB and DAISY file formats
GRAPES
This educational app allows users to graph mathematical functions and relationships with advanced features. It incorporates dynamic "movement" to enhance learning and includes nearly 150 samples. Optimized for tablets, it offers a streamlined experience for exploring mathematics.
- Graph relations and discontinuous functions
- Learn through dynamic 'movement'
- Tablet-optimized UI
- Includes nearly 150 samples
- Advanced mathematical functions
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高校数学教育界で永く人気があるGRAPESのiOS版です。 関係式や不連続関数を正確にグラフ化できるなど高度な数学機能を備えているだけでなく、「動き」を通して数学を学習することができます。 タブレットでの利用に適したUIを作成すると共に、150近いサンプルを含める形でアプリ化しています。 モバイルアプリ(light)版はオリジナルGRAPESから以下の機能が省かれています: ・スクリプト(マクロ)機能 ・データテーブルや一部の統計機能 このバージョンはベータ版で以下の機能がまだ実装されていません: ・複素平面を使ったプロット 利用方法の詳細はサポートURLで公開されているマニュアルを参照ください。
Screenshots
Verdict
The clearest difference is rating: UD Browser at 5.0 against GRAPES's 3.0. UD Browser also leads on update cadence (every 5 days vs every 3 months). GRAPES's advantage is review sentiment (59% vs 50%) and iOS requirement (10.0 vs 15.0). On price, ratings volume, 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. Neither carries in-app purchases, so what you see is what you pay.
UD Browser holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews complicate that: 50% of UD Browser's written reviews are positive against 59% of GRAPES's, so the app with the better star average is not the one people write more warmly about.
UD Browser ships an update every 5 days, GRAPES every 3 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.
| Parameter | UD Browser | GRAPES |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 50.0% of reviews | 58.8% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 5 days — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 157 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Climb App | TOKYO SHOSEKI CO.,LTD. |
Customer experience
UD Browser
GRAPES
In-app purchases
UD Browser
No in-app purchases
GRAPES
No in-app purchases








