Comparison

Nihongo 123 vs Challenge with Erin

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

Head to head
About

Nihongo 123

This app helps users learn Japanese grammar through structured lessons. It offers video explanations, grammar notes, flashcards, listening exercises, and speaking practice. Lessons can be downloaded for offline use, excluding video and speaking features.

Highlights
  • Grammar-classified units
  • Video lessons with scripts
  • Flashcards for vocabulary
  • Listening comprehension quizzes
  • Speaking practice with voice recognition
  • Offline lesson downloads
Features
Read full description

App for learning Japanese grammar Grammar-classified Units Allow Users to Start Where They Want According to Their Learning Level
 The Learning menu is divided into Beginner’s and Intermediate grades according to the level of difficulty, with each grade divided into grammar-classified units. So users can begin learning from any desired unit according to their learning level. Lesson Procedure Touch each unit to display the corresponding Lesson menu. Each lesson is composed of [Video], [Grammar Note], [Flash Cards], [Listening] きく, and [Speaking]はなす sections. Lessons can also be downloaded for use offline. To download a lesson, touch the corresponding icon. Note that the [Video] sections and [Speaking]はなす voice recognition function are not available for use offline. Easy-to-Understand Learning with [Script-attached Dialogue Videos] * Online Only To begin a lesson, view the dialogue video first. English grammar notes appear below the play button. Touch the play button to start the video and display the script below it.  The script display area can be expanded and scrolled. Use the script to check any parts of the dialogue that were unclear, and then view the video again.  Because the lesson videos are made available through YouTube, it requires an environment with a high-speed Internet connection. Build Vocabulary with [Flash Card] * Available Offline Use [Flash Card] to learn words related to a lesson by listening to them repeatedly. Some Beginners’ level words are accompanied by easy-to-understand illustrations.  Touch “List” to display a word list. Words, Romanized spellings, English translation, and verb groups are attached to the words on the list."V1", "V2", and "V3" denote Verb Groups 1, 2, and 3, respectively; "i" and "t" denote intransitive and transitive verbs, respectively. Example: 書く kaku  write  "V1t"  In the Auto mode, cards are automatically played. Choose “Show All” to play all of the cards or “Hide Memorized Cards” to play only cards not yet memorized. In the Manual mode, the cards are sorted into two piles: “Memorized” by swiping to the left, and “Unsure” by swiping to the right. The same operation can also be performed using the “Memorized” and “Unsure” buttons.  Improve Listening Ability in Quiz Format with [Listening] きく * Available Offline Use the quiz-style [Listening] きくfunction to listen to sample sounds related to a lesson, and choose the correct answer to place in the parentheses (  ). The sounds can be played repeatedly. Check Pronunciation with [Speaking] はなす * Online Only Use the [Speaking] はなす function to form sentences in accord with the displayed contents by using grammar learned in a lesson. Touch the Microphone icon to begin voice recognition, and then say the sentence out loud toward the screen. The voice recognition software will check whether the sounds spoken are correct or not.  Listen to the correct sounds by pressing play on the Answer screen. Practice by listening to the sounds repeatedly.  Touch the Next button to display the next question. A high-speed Internet connection is required to use the [Speaking] はなすfunction. ---------------------------------------- Contact mail address jp-kyoten@un.tsukuba.ac.jp University of Tsukuba

About

Challenge with Erin

This app offers interactive lessons and quizzes to help users learn Japanese vocabulary, grammar, and culture. It features engaging games, manga-based dialogues, and cultural trivia to make studying enjoyable and effective. Track your progress, earn certificates, and compete with others on leaderboards.

Highlights
  • Interactive vocabulary games
  • Manga-based dialogue practice
  • Japanese culture quizzes
  • Progress tracking and points system
  • Weekly tests with certificates
  • Mini dictionary with Romanization
Features
Read full description

-Contents and how to use the app- Study and enjoy yourself. Study section In the study section (‘Let’s Try’) there are four maps: spring, summer, autumn and winter, and you start with spring in the same way as Japanese schools start in spring. Contents: ・KOTOBA1 remember words through a game where you match cards with the same pictures ・KOTOBA2 make sentences by matching illustrations of verbs with cards of vocabulary often used with those verbs ・KOTOBA3 choose illustration cards with the same meaning as Japanese character cards and match the cards ・MANGA become characters in a manga, choose the appropriate lines from the choices you are given, and read them out loud ・BUNKA deepen your understanding of Japan through a quiz about Japanese culture and society ・STAGE TEST a review test of what you studied at each stage. 20 multiple choice questions each with four options -Challenge yourself! - Test section There are 16 tests altogether in the test section (‘TEST’). You can take eight of these any one week. The questions change each week. Challenge yourself and check which Japanese vocabulary and words you remember and know with this test. Once you finish the tests, you will be issued with a certificate of results that includes your name. If your percentage of correct answers exceeds 80%, you receive a pass certificate that includes a medal (illustration)! -A variety of features- ・KOTOBA LIST A mini dictionary where you can find all the vocabulary and expressions that appear in the app. Each of the words that you answered that you had remembered have a check mark next to them. In the list each word is also written in Roman alphabet and hiragana/katakana, and there is a translation of the word’s meaning to enable you to study Japanese characters. ・STATUS Every time you log in to the study section and study, you receive 100 points, and when you take a stage test, that score is added as points. You can see the results of your study to date, including your overall points, your weekly points (total points from the most recent Monday to Sunday), the number of words you have remembered so far, the number of stages you have cleared, and the number of tests you have passed. ・RANKING Displayed here is the overall point ranking of all learners using this app and the number of stages they have cleared, as well as your own overall points and number of stages cleared. ・HONIGON’S CAMERA When you clear the stage test of each stage in the study section, HONIGON’S CAMERA starts up. For each stage various different frames (background illustrations) are displayed, and you can take a ‘celebratory photograph’ combining these frames and a photo of yourself that you take.

Screenshots

Nihongo 1234 screens
Challenge with Erin4 screens

Verdict

The call

The clearest difference is review sentiment: Challenge with Erin at 63% against Nihongo 123's 0%. Challenge with Erin also leads on rating (4.7 vs 3.0) and ratings volume (16 vs 1). Nihongo 123's advantage is update cadence (every 2 weeks vs every 5 months) and iOS requirement (8.4 vs 12.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Challenge with Erin holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Challenge with Erin has 16 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Nihongo 123's written reviews are positive against 63% of Challenge with Erin's.

UpkeepUpdate frequency

Nihongo 123 ships an update every 2 weeks, Challenge with Erin every 5 months. The most recent releases landed on September 26, 2026 and September 20, 2026 respectively.

Scorecard5 real differences · 5 level
Nihongo 123 versus Challenge with Erin: the parameters behind the verdict, then further details
ParameterNihongo 123Challenge with Erin
PriceFreeFree
Rating3.0 (1 ratings)4.7 (16 ratings) — better
Positive reviews0.0% of reviews62.5% of reviews — better
Number of ratings116 — better
Update frequencyEvery 2 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS8.4 — better12.0
Further details — not scored
Size7 MB290 MB
Age rating4+4+
DeveloperUniversity of TsukubaThe Japan Foundation Japanese-Language Institute, Kansai

Customer experience

Nihongo 123

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Challenge with Erin

All ratings16 ratings
Positive93.8%
Neutral0.0%
Negative6.3%
Written reviews24 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

In-app purchases

None

Nihongo 123

No in-app purchases

None

Challenge with Erin

No in-app purchases

Questions

Is Nihongo 123 free?
Nihongo 123 is free to download, with no in-app purchases.
Is Challenge with Erin free?
Challenge with Erin is free to download, with no in-app purchases.
Which has better reviews, Nihongo 123 or Challenge with Erin?
Challenge with Erin is rated higher. Nihongo 123 averages 3.0 out of 5 from 1 ratings, while Challenge with Erin averages 4.7 from 16 ratings.
Do Nihongo 123 or Challenge with Erin have ads?
Neither Nihongo 123 nor Challenge with Erin shows ads.
Which is updated more often, Nihongo 123 or Challenge with Erin?
Nihongo 123 ships an update every 2 weeks, and Challenge with Erin every 5 months. Most recently, Nihongo 123 was updated on September 26, 2026 and Challenge with Erin on September 20, 2026.

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