65
BU Score
Solid
JClass: Learn japanese
✍️ BU Analytics Review
“
JClass: Learn japanese is an iOS app from Jorge Cozain in the News category, currently rated 4.7★ across 375 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 65 — Solid (established niche player). For a News app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| Mature app (8y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| Early-stage install base (375 ratings)METRIC | +$400 | |
| Single-language (English only)METRIC | −$400 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 73 MB🔞 4+📱 iOS 10.0+🔖 v1.1.0🔄 updated 5y ago🌐 EN📂 News💰 Paid🚀 Launched 2017 (8y old)
📝 About this app
Learn Japanese easily with Yui-chan.
After a long time you've finally achieved your dream of moving to Japan. Bad news is you've been so busy with preparations that you forgot to learn Japanese! What a mess...
Good news is your classmate Yui is willing to help you with your Japanese so you can survive in Japan. Isn't she lovely?!
App characteristics:
• Review content by level in the dictionary sections. (Start with hiragana and katakana, then Kanji and then Vocabulary.
• Go to Quiz mode and evaluate your learning.
• Your progress will be shown in the main screen.
• The more you progress the more achievements you will earn in Game Center.
• Prove nobody knows more than you in the rankin list.
Comments and support:
contact@cozain.com
Note: The kanji and vocabulary content is divided by JLPT level N5 to N1 (purchase required). There are no official JLPT lists yet but if JLPT decides to create one, the app will be modified.
After a long time you've finally achieved your dream of moving to Japan. Bad news is you've been so busy with preparations that you forgot to learn Japanese! What a mess...
Good news is your classmate Yui is willing to help you with your Japanese so you can survive in Japan. Isn't she lovely?!
App characteristics:
• Review content by level in the dictionary sections. (Start with hiragana and katakana, then Kanji and then Vocabulary.
• Go to Quiz mode and evaluate your learning.
• Your progress will be shown in the main screen.
• The more you progress the more achievements you will earn in Game Center.
• Prove nobody knows more than you in the rankin list.
Comments and support:
contact@cozain.com
Note: The kanji and vocabulary content is divided by JLPT level N5 to N1 (purchase required). There are no official JLPT lists yet but if JLPT decides to create one, the app will be modified.
🆕 What's New · v1.1.0
Removed IAP
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- JClass: Learn japanese
- Developer
- Jorge Cozain
- Bundle ID
- com.jorgecozain.X20
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 4+
- Languages
- EN
Company
- Website
- Not found
- Tagline
- Today
- Description
- Find apps and games for iPhone, iPad, Mac, and more on the App Store.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $8.1K/mo
- Top-grossing rank
- Outside top 100 in US News
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://apps.apple.com/us/app/letterloop-group-newsletters/id6468623700
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://apps.apple.com/us/iphone/story/id1895675718
📈Ratings growth375 ratings+37400% lifetimeShow 3-year history estimate ▾
Tracked (18 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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