Grammatisch - Deutsch lernen
66
Quality Score
Solid
✍️ Bumetric analysis
“
Grammatisch - Deutsch lernen is an iOS app from Konsonant Ensino Digital de Idiomas Ltda in the Education category, currently rated 4.7★ across 678 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 66: Solid (established niche player). For a Education app, that means established niche player. 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 tierSUBSCRIPTION
💡 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
36 snapshots on record
Rating
4.7
Reviews
678 reviews
Forecast Revenue / mo
$5.0K
Snapshots tracked
36
since Apr 2017
ONE-TIME · BUILD
💰 Estimated build cost
$135K
↳ What it cost to build · not monthly revenue
Likely range $100K – $180K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~2.2y 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 |
| 📦 Asset bundle (80 MB) | +$12K |
| ⚙ Education complexity ×1.20 | +$12K |
| ⚙ 9.6y maintenance × ~1-person team | +$57K |
Total estimate
$135K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$100K
↳ What it would sell for · not monthly revenue
Marketplace range $75K – $125K · 20× MRR multiple
💸
~0.7× 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% |
| ⭐ Small user base (<1K ratings) | -8% |
Final multiple
20× MRR
👥 Estimated audience size
40K
Lifetime downloads (US-equivalent)
Monthly active
3.9K
Daily active
1.1K
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
28% sticky
🛠 Estimated tech stack
🍎
Native iOS (Swift / UIKit)
Medium confidence · 60%
Also possible
React Native
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 | 80 MB |
| 🏷 Category context | Education |
| 📦 Mid-large iOS bundle | → Likely native Swift / UIKit (pre-2020 era) |
💀 Maintenance status
Active
15%
Last shipped 2026-08-07 · 49 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
| 📅 49 days since last update | Healthy release cadence |
Verdict
Active
🔬
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)
Direction
Tailwinds: monetization model proven
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 · 54/100MID TIERSUBSCRIPTIONunderperforming peersGrowth Velocity
5.0
Founder Strength
4.3
Product Quality
5.1
Revenue Strength
3.7
Monetization Maturity
9.5
Defensibility
8.4
Market Position
2.0
Operational Safety
5.5
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.71★ across 678 reviews — below category median.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Elevated — scam/fraud mentions detected, rating drift -0.85 ★ (recent 50 vs lifetime).
🎯 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.
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 7 of 7 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Excellent rating (4.7★)METRIC | +$2,200 | |
| 5 starREVIEW | +$1,800 | |
| cancelledREVIEW | −$1,500 | |
| Mature app (9y old)METRIC | +$1,500 | |
| Multilingual (12 languages)METRIC | +$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Early-stage install base (678 ratings)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.
🆕 What's New · v4.1.22
• Bug fixes
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Grammatisch - Deutsch lernen
- Developer
- Konsonant Ensino Digital de Idiomas Ltda
- Bundle ID
- CI.GrammarApp
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 4+
- Languages
- AR, EN, FR, DE, IT, PL, PT, RU, ES, TH, TR, UK
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 growth707 ratings+70600% lifetimeShow 3-year history estimate ▾
Tracked (36 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.
🚀Update Frequency · Releases per Quarter4 releases tracked
🚀Version Release Timeline4 releases tracked
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
Learn German for real with Grammatisch. The app has thousands of exercises as well as summaries, tables and lists for the key topics of the German grammar. You don’t need to take leveling tests, just pick any topic and start learning it. You can solve dozens of exercises in a row to memorize concepts and grammar rules in a short time. When you finish an exercises session, you can check your score and a detailed correction of your answers.
The following topics are covered:
• Bestimmter Artikel
• Pluralform
• Personalpronomen
• Verbkonjugation - Präsens
• Possessivpronomen
• Reflexive Verben… View full description on the official store →
The following topics are covered:
• Bestimmter Artikel
• Pluralform
• Personalpronomen
• Verbkonjugation - Präsens
• Possessivpronomen
• Reflexive Verben… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 80 MB🔞 4+📱 iOS 18.0+🔖 v4.1.22🔄 updated 1mo ago🌐 AR, EN, FR, DE, IT +7📂 Education💰 Paid🚀 Launched 2017 (9y old)
📅
What Worked™ · Development Pipeline
12 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 →
2026-08
📦
Bundle ↓ 135MB → 84MB — likely major code refresh
2026-08
📸
Refreshed store screenshots — 4 of 6 updated
2026-08
🔧
Shipped update — v4.1.18 → v4.1.22
2026-07
🔧
Shipped update — v4.1.11 → v4.1.18
→ 30 days after: reviews +14 high confidence
2026-06
🔧
Shipped update — v3.8.1 → v4.1.11
→ 30 days after: reviews +25 medium · co-occurring
2026-05
🔄
Monetization changed: freemium → free
→ 30 days after: reviews +15 high confidence
2026-03
⭐
Rating ↑ 3.50 → 4.70 (improved 1.20★)
2026-03
📈
Crossed 50 ratings — social-proof flywheel kicking in
2020-04
⭐
Rating ↓ 4.11 → 3.80 (dropped 0.31★)
→ 30 days after: rating −0.13★ high confidence
2020-04
📈
Crossed 10 ratings — social-proof flywheel kicking in
→ 30 days after: rating −0.13★ high confidence
2017-11
⭐
Rating ↓ 5.00 → 4.00 (dropped 1.00★)
2017-04
🚀
First tracked snapshot — initial data captured
📸
Store Page History
4 SCREENSHOT CHANGESEvery time a developer swaps a store screenshot we archive both versions. Compare side-by-side to see what messaging / visuals changed.
iPad screenshots
Slot 1
2 ver.
2 ver.
2026-05-13
2026-08-29
Slot 2
2 ver.
2 ver.
2026-05-13
2026-08-29
Slot 3
2 ver.
2 ver.
2026-05-13
2026-08-29
Slot 4
2 ver.
2 ver.
2026-05-13
2026-08-29
🗣
Voice of Customer
Based on 124 reviews across 7 markets● 47% positive · ● 24% neutral · ● 29% negative · Rating drift: -0.85★ (declining — recent 50: 3.86★ vs lifetime: 4.71★)
VADER compound sentiment per quarter (−1 = fully negative, +1 = fully positive). Each point ≥ 5 reviews.
Sentiment by country (−1 to +1)
🇺🇸 US
+0.45
🇨🇦 CA
+0.41
🇮🇳 IN
+0.25
🇧🇷 BR
+0.14
🇬🇧 GB
+0.14
🇫🇷 FR
+0.01
🇩🇪 DE
-0.14
Top praise themes
german grammar ×11 learning german ×6 sehr gut ×5 ich habe ×4 learning language ×3 diese hat ×3 hat mir ×3 mir sehr ×3
Top complaint themes
free trial ×4 help text ×3 das ist ×3 immer wieder ×3 ich habe ×3 und ich ×3 die ×13 nicht ×11
Risk signals
Refund mentions: 0.8% Subscription complaints: 5% Bug mentions: 3% Fraud / scam mentions: 0.8%
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇦🇺 AU | 4.55556★ | 54 | 4.55556★ this version |
| 🇧🇷 BR | 4.77037★ | 270 | 4.77037★ this version |
| 🇨🇦 CA | 4.56757★ | 37 | 4.56757★ this version |
| 🇩🇪 DE | 4.65717★ | 7,056 | 4.65717★ this version |
| 🇫🇷 FR | 4.34188★ | 117 | 4.34188★ this version |
| 🇬🇧 GB | 4.59476★ | 153 | 4.59476★ this version |
| 🇮🇳 IN | 4.5★ | 58 | 4.5★ this version |
| 🇯🇵 JP | 4.68421★ | 19 | 4.68421★ this version |
| 🇺🇸 US | 4.69134★ | 716 | 4.69134★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for Grammatisch - Deutsch lernen: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
More by Konsonant Ensino Digital de Idiomas Ltda
View all →📦 Portfolio summaryINDIE studio
2apps·$9K/mocombined
Lead-app heavy — top app contributes 51%
About this analysis
Why medium confidence: 678 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
10 answers · auto-generated from this app's public dataHow much does Grammatisch - Deutsch lernen make per month?▴
Based on our ML-calibrated revenue forecast, Grammatisch - Deutsch lernen 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 Grammatisch - Deutsch lernen profitable?▴
With estimated build cost $135K and monthly revenue $5.0K, Grammatisch - Deutsch lernen looks break-even-grade — payback period sits around 2.2 years. Profitability also depends on paid-acquisition spend and refund rate which the public model doesn't see.
How many users does Grammatisch - Deutsch lernen have?▴
Estimated audience: ~40K lifetime downloads, ~3K monthly active users, and ~1K 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 Grammatisch - Deutsch lernen?▴
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 Grammatisch - Deutsch lernen built with?▴
Our heuristic places Grammatisch - Deutsch lernen on the Native iOS (Swift / UIKit) stack (Medium confidence, 60%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: React Native, Flutter.
Is Grammatisch - Deutsch lernen still actively maintained?▴
Maintenance status: Active (15% abandonment risk). Last shipped version was 1 months ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
How much would Grammatisch - Deutsch lernen sell for?▴
Estimated acquisition value: $100K (marketplace range $75K – $125K). Calculated as 20× 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 Grammatisch - Deutsch lernen last updated?▴
Grammatisch - Deutsch lernen last shipped a new version on 2026-08-07 — 1 months ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Grammatisch - Deutsch lernen?▴
Grammatisch - Deutsch lernen is published by Konsonant Ensino Digital de Idiomas Ltda 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 Grammatisch - Deutsch lernen's BU Score?▴
Grammatisch - Deutsch lernen has a BU Score of 66/100 (Solid). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.