るびポン vs 見開きPDF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
るびポン
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RubiPon is a Safari extension that adds furigana (kana reading hints) to kanji on the Japanese web pages you visit — news sites, encyclopedias, official announcements, anything. FEATURES - One-tap furigana on any Japanese page, with an optional auto-on setting — live-updating pages (social feeds, live blogs) are supported too - Three dictionaries to choose from: the built-in system analyzer, the IPA dictionary, and the large-vocabulary Sudachi dictionary (with optional Core/Full downloads) - 600+ built-in reading-correction rules for dates, counter words and common idiomatic readings (e.g. 1月1日, 3階, 2泊3日, 二人) - A personal user dictionary for names and technical terms - Hiragana-first mode: kana becomes the main text with small kanji above — great for early readers - Romaji mode: show readings in romaji instead of hiragana — handy for beginning learners of Japanese - Fine display control (ruby size, line height, spacing), remembered per site (up to 100 sites) - Privacy by design: all analysis runs on your device. Nothing you browse is ever sent to any server. No ads, no tracking. HOW TO USE 1. Open the app and enable RubiPon in Settings > Safari > Extensions 2. Open a Japanese page and tap the extension icon in the address bar 3. Tap "Show furigana" Note: readings are generated automatically and may occasionally be wrong; correction rules and the user dictionary help you fix them. Network access is used only when downloading the optional Sudachi dictionaries.
見開きPDF
This utility app displays PDF files in a two-page spread view. It is designed for easy reading of documents that are meant to be viewed side-by-side. Currently, it does not support PDF editing functionalities.
- Two-page spread view for PDFs
- Optimized for document readability
- Supports iPhone and iPad
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PDFファイルを見開きで表示します。 ※現時点ではPDFファイルの編集には対応していません。
Screenshots
Verdict
The clearest difference is device support: るびポン at 4 against 見開きPDF's 2. るびポン also leads on iOS requirement (15.4 vs 26.0). On 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
| Parameter | るびポン | 見開きPDF |
|---|---|---|
| Price | Free — better | — |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.4 — better | 26.0 |
| Further details — not scored | ||
| Size | 140 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Kotatsu RIN | HOTATE JUNSHI |
In-app purchases
るびポン
No in-app purchases
見開きPDF
No in-app purchases





