Легка Японська Хірагана з MARU
80
Quality Score
Excellent
Легка Японська Хірагана з MARU
by Overdreamer, LLC
High confidence
✍️ Bumetric analysis
“
Легка Японська Хірагана з MARU is an iOS app from Overdreamer, LLC in the Education category, currently rated 4.9★ across 17,355 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Quality Score is 80: Excellent (strong product-market fit). For a Education app, that means strong product-market fit. The full BU Investment Matrix below scores 8 dimensions including monetisation, growth, and operational risk.
Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.
💰 Monthly revenue · now vs forecast
● Right now
$5.0K
per month
→
12-mo forecast
$5.2K – $10.8K
per month
→
24-mo forecast
$6.4K – $19.2K
per month
MID tierFREE
💡 Grow this revenue
Free AI audit of this app’s store listing
- Title & subtitle keyword fit
- Description hook & conversion structure
- Screenshots, ratings, reviews strategy
Typical impact: +2-5× organic installs
📊 Performance Tracking LIVE
360 snapshots on record
Rating
4.9
Reviews
17,355 reviews
Forecast Revenue / mo
$5.0K
Snapshots tracked
360
since Feb 2025
ONE-TIME · BUILD
💰 Estimated build cost
$120K
↳ What it cost to build · not monthly revenue
Likely range $90K – $160K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2.0y at current MRR
Synthetic estimate. Inputs: category complexity, file size, screen count, monetization layer, platform reach, age × team-size proxy. Calibrated against 2024-2026 indie-agency rate surveys. Full math + source list on /methodology.
Where the money goes
| 🧱 MVP baseline (design + 1-store ship) | +$28K |
| 📱 5 unique screens × $4.5K | +$22K |
| ⚙ Education complexity ×1.20 | +$10K |
| ⚙ 9.6y maintenance × ~1-person team | +$57K |
Total estimate
$120K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$100K
↳ What it would sell for · not monthly revenue
Marketplace range $75K – $150K · 22× MRR multiple
💸
~0.8× build cost (under-water)
Synthetic estimate. Multiple band derived from ad-supported + age, rating quality, category demand, and user-base maturity. Calibrated against 2024-2026 indie-app-marketplace closed-deal medians. Full math + comparable deal list on /methodology.
How the multiple was built
| 📺 Ad-supported base | 15× MRR |
| 📅 9.6y proven track record | +20% |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Education category multiple | +6% |
Final multiple
22× MRR
👥 Estimated audience size
1.0M
Lifetime downloads (US-equivalent)
Monthly active
98K
Daily active
29K
Synthetic estimate from ratings × category benchmarks. Calibrated against 2024-2026 mobile-attribution retention + DAU/MAU reports. Numbers are US-storefront-equivalent — true global audience can be 5-10× larger for international apps. Full math + source list on /methodology.
How we sized it
| 📲 Education engagement | ~85 installs / rating |
| 📅 9.6y of rating accumulation | -30% |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
Medium confidence · 70%
Also possible
Flutter
Heuristic guess from app bundle size, category, store description signals, and release-date stack era. Bumetric does not disassemble binaries — for binary-level certainty you would need an SDK intelligence tool or the manifest itself. Reasoning chain on the right. Full ruleset on /methodology.
Signals we read
| 📦 App bundle size | 36 MB |
| 🏷 Category context | Education |
| 📦 Small-mid iOS bundle | → Native Swift / UIKit (pre-2020 era) |
💀 Maintenance status
Likely abandoned
88%
Last shipped 2024-08-02 · 783 days ago
0 · Active
50 · At risk
100 · Abandoned
Heuristic risk score from time-since-last-update + ratings velocity proxy + Editor's Choice / curated featuring signals. Calibrated against 2024-2025 app-store ranking decay reports. Not a guarantee — a quiet app with a healthy codebase looks the same as an abandoned one until something breaks. Full math on /methodology.
Risk signals
| 📅 2y+ since last update | Likely abandoned |
Verdict
Likely abandoned
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$5.0K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$4.7K – $7.9K
12 months
$5.2K – $10.8K
24 months
$6.4K – $19.2K
Compound growth at +4.0% MoM (tier baseline for MID). Range widens with horizon — typical noise band ±25% at 6mo.. Ranges widen with horizon — distant futures carry more uncertainty.
📊
BU Investment Matrix
Below median · 47/100MID TIERFREE (NO MONETIZATION)underperforming peersGrowth Velocity
5.0
Founder Strength
5.1
Product Quality
9.9
Revenue Strength
3.7
Monetization Maturity
0.5
Defensibility
4.4
Market Position
2.0
Operational Safety
6.8
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.93★ across 17,355 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: ⚠ last update 783d ago — possibly dormant.
- ⚠️ Risk: Moderate — dormant (783d since update).
🎯 For competitors: Mixed picture. Worth competing if you have a clear UX or pricing edge — otherwise crowded segment.
💵 For acquirers: Estimated asking range 18-32× monthly = $90K-$160K. Portfolio play ($13K/mo combined) commands premium.
Composite of 8 dimensions computed deterministically from public signals — no LLM, every score traces back to a measurable input. Default weights shown; "compete" / "acquire" / "invest" lenses re-weight without re-fetching.
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 10 of 10 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Mid install base (17,355 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
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🆕 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.… Full release notes →
• 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.… Full release notes →
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
- Available
Revenue
- Reported revenue signal / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- Model estimate / mo
- $5.0K/mo
- Top-grossing rank
- Outside top 100 in US Education
- All-time revenue
- Not found
- Pricing
- Not found
Founder
Founder data not yet collected for this app.
Funding
Funding data not yet collected for this app.
Press & Links
Press & Links data not yet collected for this app.
Contacts & Socials
Contacts & Socials data not yet collected for this app.
📈Ratings growth18,044 ratings+3946% lifetimeShow 3-year history estimate ▾
Tracked (60 weeks) Pre-tracking estimate (0 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.
📝 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!… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 36 MB🔞 4+📱 iOS 16.0+🔖 v2.15🔄 updated 2y ago🌐 CS, NL, EN, FR, DE +14📂 Education💰 Paid🚀 Launched 2017 (9y old)
📅
What Worked™ · Development Pipeline
11 EVENTS TRACKEDDetected changes in this app over its tracked lifetime — each event links cause (what changed) to effect (what moved). Sorted newest first.See full history →Version history →
2026-05
📈
Crossed 1,000 ratings — social-proof flywheel kicking in
→ 30 days after: reviews +306 high confidence
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$249/mo · reviews +9 medium · co-occurring
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$582/mo · reviews +21 medium · co-occurring
2025-05
📈
Crossed 100 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$1.1K/mo · reviews +39 high confidence
2025-05
📈
Crossed 100 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$1.9K/mo · rating +0.08★ · reviews +69 high confidence
2025-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$714/mo · reviews +26 medium · co-occurring
2025-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$1.8K/mo · rating +0.14★ · reviews +64 low · multiple changes
2025-02
🚀
First tracked snapshot — initial data captured
→ 30 days after: revenue +$1.1K/mo · rating +0.15★ · reviews +38 medium · co-occurring
2025-02
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: revenue +$1.1K/mo · rating +0.15★ · reviews +38 low · multiple changes
2025-02
⭐
Rating ↓ 5.00 → 4.33 (dropped 0.67★)
→ 30 days after: revenue +$1.1K/mo · rating +0.15★ · reviews +38 medium · co-occurring
2025-02
🚀
First tracked snapshot — initial data captured
→ 30 days after: revenue +$1.1K/mo · rating +0.15★ · reviews +38 medium · co-occurring
🗣
Voice of Customer
Based on 150 reviews across 2 markets● 79% positive · ● 21% neutral · ● 0% negative · Rating drift: +0.03★ (stable — recent 50: 4.96★ vs lifetime: 4.93★)
VADER compound sentiment per quarter (−1 = fully negative, +1 = fully positive). Each point ≥ 5 reviews.
Sentiment by country (−1 to +1)
🇺🇸 US
+0.78
🇯🇵 JP
+0.37
Top praise themes
hiragana katakana ×20 learning japanese ×12 learn hiragana ×10 learn japanese ×7 easy learn ×5 learning hiragana ×5 super helpful ×4 japanese characters ×4
Top complaint themes
— no recurring complaint themes
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.8796★ | 706 | 4.8796★ this version |
| 🇧🇷 BR | 4.9756★ | 779 | 4.9756★ this version |
| 🇨🇦 CA | 4.94454★ | 1,082 | 4.94454★ this version |
| 🇩🇪 DE | 4.92027★ | 903 | 4.92027★ this version |
| 🇫🇷 FR | 4.90204★ | 980 | 4.90204★ this version |
| 🇬🇧 GB | 4.91605★ | 2,418 | 4.91605★ this version |
| 🇮🇳 IN | 4.90291★ | 103 | 4.90291★ this version |
| 🇯🇵 JP | 4.92123★ | 876 | 4.92123★ this version |
| 🇺🇸 US | 4.9325★ | 18,221 | 4.9325★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Легка Японська Хірагана з MARU: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
About this analysis
Why high confidence: 17,355 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Легка Японська Хірагана з MARU make per month?▴
Based on our ML-calibrated revenue forecast, Легка Японська Хірагана з MARU earns approximately $5.0K/mo. This is a US-storefront-equivalent estimate; global revenue can be several times larger for internationally-distributed apps. See the methodology page for the full formula and confidence bands.
Is Легка Японська Хірагана з MARU profitable?▴
With estimated build cost $120K and monthly revenue $5.0K, Легка Японська Хірагана з MARU looks break-even-grade — payback period sits around 2.0 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Легка Японська Хірагана з MARU have?▴
Estimated audience: ~1.0M lifetime downloads, ~98K monthly active users, and ~29K daily active users. Derived from ratings count × category installs-per-rating × age decay. US-storefront-equivalent — global audience can be 5-10× larger for internationally-distributed apps.
What apps are like Легка Японська Хірагана з MARU?▴
Browse the full Education category catalog to find similar apps with revenue, build cost, audience and tech stack data. Each /p/{slug} page also shows a Compare side-by-side widget with three peer apps from the same niche.
What is Легка Японська Хірагана з MARU built with?▴
Our heuristic places Легка Японська Хірагана з MARU on the Native iOS (Swift / UIKit) stack (Medium confidence, 70%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Flutter.
Is Легка Японська Хірагана з MARU still actively maintained?▴
Maintenance status: Likely abandoned (88% abandonment risk). Last shipped version was 2+ years ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Легка Японська Хірагана з MARU sell for?▴
Estimated acquisition value: $100K (marketplace range $75K – $150K). Calculated as 22× monthly revenue using the standard multiple for the detected monetization model + adjustments for age, rating quality and category demand. Calibrated against 2024-2026 Flippa / Acquire.com / MicroAcquire closed-deal medians.
When was Легка Японська Хірагана з MARU last updated?▴
Легка Японська Хірагана з MARU last shipped a new version on 2024-08-02 — more than 2 year(s) ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Легка Японська Хірагана з MARU?▴
Легка Японська Хірагана з MARU is published by Overdreamer, LLC on the Apple App Store. See the full publisher portfolio (other apps by the same developer) via the More by developer block on the product page above.
What is Легка Японська Хірагана з MARU's BU Score?▴
Легка Японська Хірагана з MARU has a BU Score of 80/100 (Excellent). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.