Comparison

Simple Furigana vs 敬語ボタン|AI変換・返信キーボード

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Simple Furigana

Easily add ruby characters (furigana) to Japanese text. This app supports both hiragana and romaji annotations for kanji, and works with both vertical and horizontal layouts. Share or print your annotated text, or use the extension to add furigana directly within other apps like Safari.

Highlights
  • Add furigana to Japanese text
  • Supports hiragana and romaji
  • Vertical and horizontal layouts
  • Print or share annotated text
  • In-app extension for Safari and other apps
  • Offline annotation
Features
Read full description

Having trouble reading Japanese? Use SimpleFurigana - a fast and lightweight iPhone Application to add Ruby Characters (Furigana) to Japanese Text. SimpleFurigana automatically annotates Chinese characters (kanji) in Japanese text with hiragana or romaji (latin characters). Both vertical (tategaki) and horizontal (yokogaki) layouts are supported. Annotated text can be printed or shared. No network connection is required for annotation. Use the furigana app extension to add furigana to selected text in Safari as well as many other apps. You can even add furigana to entire webpages to help you navigate the web in Japanese.

About

敬語ボタン|AI変換・返信キーボード

This AI-powered keyboard helps you write Japanese messages with the appropriate tone for any situation. Easily transform your text into polite, professional, or natural-sounding Japanese, and get AI-generated replies without leaving your current app.

Highlights
  • Rewrite Japanese in one tap
  • AI-generated replies
  • Complete Japanese keyboard functionality
  • Multiple text suggestions
  • Customizable AI buttons
  • Privacy-focused input processing
Features
Read full description

Writing Japanese is one thing. Sounding right is another. A message can be grammatically correct and still feel too blunt, too casual, or strangely formal. 敬語ボタン helps you find the right tone without leaving the app you are using. Type normally in LINE, email, Slack, Instagram, or any other app, then tap an AI button to make your Japanese more polite, natural, concise, friendly, or professional. No copying everything into ChatGPT. No rewriting the same sentence five times. Just type, tap, and send with confidence. ■ Made for real-life Japanese communication ・Write appropriate messages to managers, professors, clients, and coworkers ・Turn textbook Japanese into wording that sounds more natural ・Soften messages that may come across as cold or too direct ・Create polished Japanese emails without memorizing business expressions ・Translate English into natural Japanese that fits the situation ・Generate a reply when you are unsure what to say next ■ Key features ◎ Rewrite Japanese in one tap Transform your text into polite Japanese, business Japanese, casual language, clearer wording, and more. Choose the tone that fits the person and situation. ◎ AI Reply Copy a message you received and tap Reply. AI reads the context and suggests natural responses you can send or edit. ◎ A complete Japanese keyboard Use flick input or romaji input and switch between them freely. 敬語ボタン works as your everyday Japanese keyboard—not just a separate writing tool. ◎ Multiple suggestions Compare several versions and choose the one that sounds most like you. Replace your original text instantly without complicated settings. ◎ Create AI buttons for your needs Set up buttons for tasks such as proofreading, translation, email writing, shortening, or casual conversation. ■ Designed with privacy in mind Normal keyboard input is processed on your device. Text is sent to AI only when you intentionally tap an AI button. Your everyday typing is not automatically uploaded or analyzed. ■ Recommended for ・International students and professionals living in Japan ・Japanese learners who understand the language but struggle with tone ・Anyone who regularly communicates with Japanese coworkers or clients ・People who want to write faster without sounding unnatural ・Both flick-input and romaji-input users Spend less time wondering, “Does this sound okay?” With 敬語ボタン, write Japanese that fits the moment—and send it with confidence.

Screenshots

Simple Furigana4 screens
敬語ボタン|AI変換・返信キーボード4 screens

Verdict

The call

The clearest difference is rating: 敬語ボタン|AI変換・返信キーボード at 5.0 against Simple Furigana's 4.5. 敬語ボタン|AI変換・返信キーボード also leads on in-app purchases (none vs 4) and update cadence (every 3 days vs every 4 months). Simple Furigana's advantage is ratings volume (273 vs 1). On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Simple Furigana sells 4 one-off in-app purchases. 敬語ボタン|AI変換・返信キーボード asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

敬語ボタン|AI変換・返信キーボード holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Simple Furigana has 273 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Simple Furigana ships an update every 4 months, 敬語ボタン|AI変換・返信キーボード every 3 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Simple Furigana versus 敬語ボタン|AI変換・返信キーボード: the parameters behind the verdict, then further details
ParameterSimple Furigana敬語ボタン|AI変換・返信キーボード
PriceFreeFree
Rating4.5 (273 ratings)5.0 (1 ratings) — better
Positive reviews59.6% of reviews—
Number of ratings273 — better1
Update frequencyEvery 4 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.616.4 — better
Further details — not scored
Size23 MB229 MB
Age rating4+4+
Developertelethon k.k.Yihuan Sun

Customer experience

Simple Furigana

All ratings273 ratings
Positive88.6%
Neutral2.6%
Negative8.8%
Written reviews89 reviews
Positive59.6%
Neutral7.9%
Negative32.6%

敬語ボタン|AI変換・返信キーボード

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Simple Furigana

Reported bugs

20 issues
  • Furigana is only 70% accurate
  • Cannot copy text entirely
  • Sometimes makes mistakes
  • Does not recognize kanji words more than two when clicked or highlighted
  • Only reads numbers, not all of them
Show 15 more
  • Does not read documents after scanning
  • Does not input copied text anymore
  • Not working since last update
  • Does not scan pictures as advertised
  • Furigana is not furiganing
  • App crashes from time to time
  • Incorrect furigana for 'library'
  • Cannot be used on iOS 16.3.1 iPad Pro
  • No longer usable
  • Does not scan or is confusing
  • Cannot read documents after scanning
  • Does not recognize kanji words of more than two characters
  • Only reads numbers, and not all of them
  • Does not read documents after scanning
  • Does not input copied text anymore

Requested features

12 requests
  • Add UX for 1 tap and 2 taps for immediate furigana
  • Add furigana for vertical documents
  • Import photos for furigana generation
  • Option to set language to Chinese
  • Ability to select specific character ranges for manual pronunciation alteration
Show 7 more
  • Add 'Aozora Bunko format' for plain text output
  • Add option to center furigana over kanji
  • Add English translations for some phrases
  • Allow users to edit incorrect furigana
  • Add support for English and other languages
  • Add functionality to send furigana-enabled text messages
  • Option to always have the app in Furigana mode

敬語ボタン|AI変換・返信キーボード

Not enough reviews yet to summarise bugs or requests.

In-app purchases

4 purchases

Simple Furigana

One-time4
  • Ipadic DictionaryFree
  • UnidicFree
  • NAIST JDicFree
Show 1 more
  • JumandicFree
None

敬語ボタン|AI変換・返信キーボード

No in-app purchases

Questions

Is Simple Furigana free?
Simple Furigana is free to download, with in-app purchases available.
Is 敬語ボタン|AI変換・返信キーボード free?
敬語ボタン|AI変換・返信キーボード is free to download, with no in-app purchases.
Which has better reviews, Simple Furigana or 敬語ボタン|AI変換・返信キーボード?
敬語ボタン|AI変換・返信キーボード is rated higher. Simple Furigana averages 4.5 out of 5 from 273 ratings, while 敬語ボタン|AI変換・返信キーボード averages 5.0 from 1 ratings.
Do Simple Furigana or 敬語ボタン|AI変換・返信キーボード have ads?
Neither Simple Furigana nor 敬語ボタン|AI変換・返信キーボード shows ads.
Which is updated more often, Simple Furigana or 敬語ボタン|AI変換・返信キーボード?
Simple Furigana ships an update every 4 months, and 敬語ボタン|AI変換・返信キーボード every 3 days. Most recently, Simple Furigana was updated on November 9, 2026 and 敬語ボタン|AI変換・返信キーボード on October 31, 2026.

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