VSimulator vs ZenFuri_Ruby on All Japanese
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VSimulator
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ロービジョンの見え方のシミュレーションや逆転視等の体験が出来るアプリ
ZenFuri_Ruby on All Japanese
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For supporting individuals with dyslexia (reading and writing disabilities, learning disabilities, dyslexia, dysgraphia) who have difficulty reading kanji and katakana. For those studying Japanese. An app that adds furigana to all kanji and katakana. Features: ■Adds furigana not only to kanji but also to katakana ■Adds furigana and romaji to text in photos from your album (gallery) or taken with your camera ■Adds hiragana to pasted text ■Supports both vertical and horizontal writing Use Cases: •When difficult kanji appear in school textbooks •When legal terms are challenging •When you need to memorize the Japanese Constitution •When you become interested in copying the Heart Sutra •When the consequences of skipping kanji studies in compulsory education catch up with you •When you decide not to study kanji and rely on the app instead •But remember, you can't use the app during tests, so make sure you can read properly •Oops, you came to Tokyo before studying Japanese! Good grief •OH! MY! GOD! Kanji, hiragana, and katakana? Japanese is too crazy! *Internet connection required Web Services by Yahoo! JAPAN (https://developer.yahoo.co.jp/sitemap/)
Screenshots
Verdict
The clearest difference is in-app purchases: VSimulator at none against ZenFuri_Ruby on All Japanese's 3. VSimulator also leads on ads (none vs shown). ZenFuri_Ruby on All Japanese's advantage is update cadence (fortnightly vs every 6 weeks). On price, device support and iOS requirement 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. ZenFuri_Ruby on All Japanese sells 3 in-app purchases, starting at $1.99 per month. VSimulator asks for nothing beyond the download.
VSimulator ships an update every 6 weeks, ZenFuri_Ruby on All Japanese fortnightly. Both last shipped on October 25, 2026.
| Parameter | VSimulator | ZenFuri_Ruby on All Japanese |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 108 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasushi Nakano | Koji Watanabe |
In-app purchases
VSimulator
No in-app purchases
ZenFuri_Ruby on All Japanese
- Ad-Free Subscription$1.991 Month
- Ad-Free Subscription$12.991 Year
- Donate$4.99
Questions
Is VSimulator free?
Is ZenFuri_Ruby on All Japanese free?
Do VSimulator or ZenFuri_Ruby on All Japanese have ads?
Which is updated more often, VSimulator or ZenFuri_Ruby on All Japanese?
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