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80
BU Score
Excellent

Легка Японська Хірагана з MARU

4.9 ✍️ Editor
✍️ BU Analytics Review

Легка Японська Хірагана з MARU is an iOS app from Overdreamer, LLC in the Education category, currently rated 4.9★ across 17,291 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.

Our BU Score puts it at 80Excellent (strong product-market fit). For a Education app, that means strong product-market fit.

Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
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since first record
Range:

💰 Forecast Revenue / mo

MODEL
Revenue 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 10 of 10 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Mid install base (17,291 ratings)METRIC
+$5,500
Excellent rating (4.9★)METRIC
+$2,200
5 starREVIEW
+$1,800
excellent appREVIEW
+$1,500
Mature app (9y old)METRIC
+$1,500
Multilingual (19 languages)METRIC
+$1,500
highly recommendREVIEW
+$1,400
slowREVIEW
−$1,200
annoying adsREVIEW
−$1,100
Ad-supported / freemiumMETRIC
+$600
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Apr 25
May 25
Jun 25
Jul 25
Aug 25
Sep 25
Oct 25
Nov 25
Dec 25
Jan 26
Feb 26
Mar 26

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 36 MB🔞 4+📱 iOS 16.0+🔖 v2.15🔄 updated 1y ago🌐 CS, NL, EN, FR, DE +14📂 Education💰 Paid🚀 Launched 2017 (9y old)

📝 About this app

Hey there! (•u•) Interested in learning Japanese but don't know where to start? You've come to the right place! MARU Japanese Kana, loved by over a million learners worldwide with an average rating of 4.9 (thank you so much!), is just what you need. As a lifelong learner of Japanese myself, I created this app to make Japanese alphabets less intimidating and more enjoyable. It's a simple app that focuses on one thing but does it very well: helping you start learning Japanese. I wish MARU had been around when I started learning Japanese. Lucky you!

Stop learning with those robotic voices and non-native pronunciations. That will impede your learning effectiveness. Dive in and experience authentic Japanese through exercises voiced by a professional voice actress. With 14 different practice varieties, learning Hiragana and Katakana becomes a breeze. Reading, writing, listening, typing, and even building your vocabulary – it's all here, making it the perfect start to your Japanese journey!

What's the catch? You’ll see an ad after every five mistakes. Since MARU's launch in 2017, it’s been downloaded over a million times, yet ad revenue has been modest. But that’s okay! My goal is to spread the joy of learning Japanese.

To fulfill that goal, I try to provide tremendous value for everyone and keep as little as possible behind the Pro Version.

Here’s what you’ll find in the default Free Version:

• All 105 Hiragana and Katakana characters, not just the basic ones.
• A short ad after 5 mistakes. No mistakes = No ads.
• Over 300 everyday words for practice, like "hello" and "thank you."
• Clear voice recordings for all words and characters.
• MARU-kun, our adorable mascot, greets and motivates you each time you practice.
• Date and Time that changes every minute to teach you Japanese words for numbers and calendar.
• A smart feature that identifies your weak spots and helps you improve.
• A fun way to practice Katakana using familiar Hiragana words.

My app is completely free with minimal ads, but if you choose to upgrade to the Pro Version (one-time purchase), you’ll enjoy:

• An ad-free experience.
• Offline practice, anytime, anywhere.
• Writing and typing exercises.
• Timed challenges to test yourself.
• Access to more words for time, date, and Katakana.

Don't just take my word for it. Here’s one of my favorite reviews:

"This is MY #1 app for learning Japanese. I downloaded EVERY Japanese app I could find without paying a single dime. The app does exactly what it promises - nice graphics, great voice acting, and awesome practice methods. I'm in love with this awesome app!" - A happy user

Thanks for reading! If you're interested, just download and start your Japanese learning adventure with MARU! (•u•)

🆕 What's New · v2.15

やっほー! Your favorite Hiragana learning app just got an update (•u•):

• New MARU(•u•) Design! I’ve given MARU a new app icon, brighter colors, and some new expressions. MARU’s lip-syncing is smoother now too.

Let me know if you liked it! Thank you for your support! Keep learning with MARU!

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
Легка Японська Хірагана з MARU
Developer
Overdreamer, LLC
Bundle ID
io.learnjapanese.SuperKanaDrill
App Store URL
Open in App Store
Category
Education
Content rating
4+
Languages
CS, NL, EN, FR, DE, ID, IT, KO, PL, PT, RU, ZH, ES, SV, TH, ZH, TR, UK, VI

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
$13.9K/mo
Top-grossing rank
Outside top 100 in US Education
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
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
Email
Not found
Phone
Not found
Contact page
Not found
About page
https://apps.apple.com/us/iphone/story/id1895870717
📈Ratings growth17,291 ratings+42% lifetimeShow 3-year history estimate ▾May 2023Jan 2026May 2026
Tracked (32 weeks) Pre-tracking estimate (36 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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