Comparison

Numbiro vs JBP I 4th

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

Head to head
About

Numbiro

Practice recognizing spoken Japanese numbers to improve comprehension in everyday conversations. Choose number ranges from single digits to billions and practice Japanese counters. Compete against the clock to get as many correct as possible.

Highlights
  • Listen to spoken Japanese numbers
  • Identify numbers by listening
  • Select number ranges
  • Practice Japanese counters
  • Timed challenges
Features
Read full description

Learning to say numbers is one thing. Understanding them in real conversation is another. With Numbiro, you listen to numbers spoken in one of 29 languages and identify what you hear. Practice anything from single digits to millions or even billions, and improve your speed and accuracy under pressure. Japanese learners can also practice counters, with 20 included in the free version. Challenge yourself to see how many answers you can get right in one minute. Supported languages include Arabic, Brazilian Portuguese, Cantonese, Catalan, Czech, Danish, Dutch, English, Finnish, French, German, Hindi, Icelandic, Italian, Japanese, Korean, Mandarin, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish and Welsh. Numbiro is ad-supported. Premium removes ads and unlocks additional features, including preset management and advanced Japanese counters, available with either a one-time purchase or subscription. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

JBP I 4th

This app provides supplementary study materials for the Japanese for Busy People I Revised 4th Edition textbook. It features flashcards with pronunciation, adjustable playback speed for dialogues and speaking practice, quizzes, and settings for Hiragana/Romaji display.

Highlights
  • Electronic flashcards with pronunciation
  • Adjustable playback speed for dialogues
  • Speaking practice exercises
  • Lesson quizzes
  • Hiragana/Romaji display options
  • Progress tracking for memorized words
Features
Read full description

This App is a supplementary study material complementing the Japanese for Busy People I Revised 4th Edition textbook. Use the Lite version, when you study lessons L1 through L5 in the textbook. Each lesson consists of the following segments: WORD POWER TARGET DIALOGUE SPEAKING PRACTICE(S) ADDITIONAL STUDIES QUIZ A BREAK SETTINGS *Choose Hiragana or Roma-ji on each page. ■WORD POWER Word Power is an electronic ""flash cards"" with sound feature for pronunciation. Check off Memorized, once you learn a word. You can later come back and study just the words you have yet to memorize or all of the words in the lesson. Go to Play and choose auto to automatically scroll through images accompanied by sound. Slide the green button to change the setting. ■TARGET DIALOGUE Study the Target Dialogue using the adjustable playback speed. ■SPEAKING PRACTICE(S) Study the Speaking Practice(s) using the adjustable playback speed. ■ADDITIONAL STUDIES This segment includes additional and important materials not covered in the Word Power, Target Dialogue, and Speaking Practice(s) segments. ■QUIZ Take the Quiz on what you have learned. Repeat until you get all the answers right. You can also go back to review the incorrect answers. ■A BREAK Take a break and enjoy of Japanese sceneries. ■SETTINGS The following settings are available: ・Default Hiragana or Roma-ji display in the Target Dialogue, Speaking Practices, and Quiz segments ・Word Power auto play speed ・Clearing the words checked off in Word Power ・Erasing the Quiz score

Screenshots

Numbiro4 screens
JBP I 4th4 screens

Verdict

The call

The clearest difference is price: Numbiro at Free against JBP I 4th's $2.99. Numbiro also leads on rating (4.4 vs 4.0) and update cadence (every 2 months vs every 47 months). JBP I 4th's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support 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

Numbiro is free to download; JBP I 4th costs $2.99 up front. Numbiro sells 2 in-app purchases, starting at $0.49 per month. JBP I 4th asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Numbiro holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Numbiro has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 75% of Numbiro's written reviews are positive against 100% of JBP I 4th's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Numbiro ships an update every 2 months, JBP I 4th every 47 months. Both last shipped on November 3, 2026.

Scorecard9 real differences · 1 level
Numbiro versus JBP I 4th: the parameters behind the verdict, then further details
ParameterNumbiroJBP I 4th
PriceFree — better$2.99
Rating4.4 (7 ratings) — better4.0 (1 ratings)
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings7 — better1
Update frequencyEvery 2 months — betterEvery 47 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationAd-supported — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size68 MB80 MB
Age rating4+4+
DeveloperSulisoft LimitedAssociation for Japanese-Language Teaching

Customer experience

Numbiro

All ratings7 ratings
Positive85.7%
Neutral14.3%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral25.0%
Negative0.0%

JBP I 4th

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Numbiro

Subscriptions1
  • Premium Monthly$0.491 Month
One-time1
  • Premium Lifetime$3.99
None

JBP I 4th

No in-app purchases

Questions

Is Numbiro free?
Numbiro is free to download, with in-app purchases available.
Is JBP I 4th free?
JBP I 4th costs $2.99, with no in-app purchases.
Which has better reviews, Numbiro or JBP I 4th?
Numbiro is rated higher. Numbiro averages 4.4 out of 5 from 7 ratings, while JBP I 4th averages 4.0 from 1 ratings.
Do Numbiro or JBP I 4th have ads?
Numbiro shows ads; JBP I 4th does not.
Which is updated more often, Numbiro or JBP I 4th?
Numbiro ships an update every 2 months, and JBP I 4th every 47 months. Most recently, Numbiro was updated on November 3, 2026 and JBP I 4th on November 3, 2026.

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