33
Quality Score
Emerging
Grammatik aktiv A1-B1 Deutsch
Low confidence
✍️ bumetric analysis
“
Grammatik aktiv A1-B1 Deutsch is an iOS app from Cornelsen Verlag GmbH in the News category, currently rated 3.0★ across 4 ratings. Initial signal reads as mostly critical sentiment so far: users flag rough edges and unmet expectations.
Quality Score is 33: Emerging (early traction worth watching). For a News app, that means early traction worth watching. 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 tier
💡 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
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
ONE-TIME · BUILD💰 Estimated build cost
$75K
↳ What it cost to build · not monthly revenue
Likely range $55K – $100K
$25K · MVP floor$100K · indie scale$500K+ · studio build
📈Slow ROI — current MRR is well below build cost
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 |
| ⚙News complexity ×1.20 | +$10K |
| ⚙2.6y maintenance × ~1-person team | +$15K |
Total estimate$75K
🛠 Estimated tech stack
🍎
Native iOS (SwiftUI)
High confidence · 80%
Also possible
Native iOS (Swift / UIKit)
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 | 17 MB |
| 🏷Category context | News |
| 📦Compact iOS bundle | → Native SwiftUI (post-2020 era) |
💀 Maintenance status
Active
15%
Last shipped 2026-05-07 · 17 days ago
0 · Active50 · At risk100 · 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
| 📅17 days since last update | Active development |
| 👥Small user base (4 ratings) + 2.6y old | +10% (solo-project pattern) |
VerdictActive
🔬
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
Headwinds: rating drift may slow acquisition
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 · 42/100MID TIERunderperforming peersRevenue Strength
3.7
Product Quality
2.4
Market Position
2.0
Growth Velocity
5.0
Defensibility
5.7
Operational Safety
8.0
Founder Strength
6.2
Monetization Maturity
1.0
- 💰 Revenue: Modest — $3K - $7K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 3.0★ across 4 reviews — weak — significant quality concerns.
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Moderate — no material risk signals detected.
🎯 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 6 of 6 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| bugsREVIEW | −$1,800 | |
| Below-average rating (3.0★)METRIC | −$1,500 | |
| Ad-supported / freemiumMETRIC | +$600 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (4 ratings)METRIC | −$300 | |
| Growing app (2y old)METRIC | +$200 |
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.
App Specs
🔐 Own this app? Claim & verify MRR →💾 17 MB🔞 4+📱 iOS 14.0+🔖 v2.4.4🔄 updated 2w ago🌐 DE📂 News💰 Free🚀 Launched 2023 (2y old)
📝 About this app
Learn German grammar individually and effectively!
Learn and practice German grammar at levels A1, A2 and B1 with our Grammatik aktiv app. The app offers explanations of 70 different grammar topics and a variety of interactive exercises that are specifically designed to improve your German at levels A1, A2 and B1.
With Grammatik aktiv you can learn German grammar in a targeted manner and improve your language skills sustainably. The app adapts to your level of learning and offers you a tailor-made learning experience through adaptive learning paths.… View full description on the official store →
Learn and practice German grammar at levels A1, A2 and B1 with our Grammatik aktiv app. The app offers explanations of 70 different grammar topics and a variety of interactive exercises that are specifically designed to improve your German at levels A1, A2 and B1.
With Grammatik aktiv you can learn German grammar in a targeted manner and improve your language skills sustainably. The app adapts to your level of learning and offers you a tailor-made learning experience through adaptive learning paths.… View full description on the official store →
🆕 What's New · v2.4.4
This update brings a smoother and more reliable app experience.
• Improved handling of unstable internet connections
• New splash screen for a refreshed app start
• Small UX improvements and stability fixes
Thank you for using our app!
• Improved handling of unstable internet connections
• New splash screen for a refreshed app start
• Small UX improvements and stability fixes
Thank you for using our app!
📅
What Worked™ · Development Pipeline
4 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 →
2026-03
⭐
Rating ↑ 2.00 → 3.10 (improved 1.10★)
2026-03
📈
Crossed 10 ratings — social-proof flywheel kicking in
2025-07
⭐
Rating ↑ 1.00 → 2.00 (improved 1.00★)
2025-02
🚀
First tracked snapshot — initial data captured
🧪
Tech & Domain Intel — youtube.com
- Mail provider
- Google Workspace
- Tech stack
- Meta (Facebook) Ads · Google Workspace
Derived from public RDAP + DNS TXT records (no scraping, no login).
🌍
Multi-Country Performance
Available in 9 of 9 monitored markets| Market | Rating | Reviews | Current version |
|---|---|---|---|
| 🇺🇸 US | 3★ | 4 | 3★ this version |
| 🇬🇧 GB | 2.33333★ | 3 | 2.33333★ this version |
| 🇩🇪 DE | 3.15★ | 20 | 3.15★ this version |
| 🇫🇷 FR | 0★ | 0 | — |
| 🇯🇵 JP | 0★ | 0 | — |
| 🇨🇦 CA | 0★ | 0 | — |
| 🇦🇺 AU | 5★ | 1 | 5★ this version |
| 🇧🇷 BR | 0★ | 0 | — |
| 🇮🇳 IN | 5★ | 1 | 5★ this version |
🔔
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Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Grammatik aktiv A1-B1 Deutsch
- Developer
- Cornelsen Verlag GmbH
- Bundle ID
- de.cornelsen.agt
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 4+
- Languages
- DE
Company
- Website
- www.youtube.com
- Tagline
- YouTube
- Description
- Auf YouTube findest du die angesagtesten Videos und Tracks. Außerdem kannst du eigene Inhalte hochladen und mit Freunden oder gleich der ganzen Welt teilen.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Available
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $131/mo
- Top-grossing rank
- Outside top 100 in US News
- 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
- Socials
- facebook facebook.com/youtube/?ref=br_r · instagram instagram.com/youtube · twitter twitter.com/YouTube · youtube tv.youtube.com/learn/nflsundayticket
- Not found
- Phone
- Not found
- Contact page
- youtube.com/t/contact_us
- About page
- youtube.com/about
⭐Recent App Store Reviews1 latest · avg 1.0★ · 0% 5★ · 100.0% 1★
5★0 (0%)
4★0 (0%)
3★0 (0%)
2★0 (0%)
1★1 (100%)
+0 ratings/week
Praise: recommend ×1Complaints: worst ×1
Top negative
★☆☆☆☆ Impossible to navigate
One of the worst apps I have ever downloaded. If you download this app it is almost impossible to login to your account if you have the book I strongly recommend you do not download this app…
📈Ratings growth4 ratingsShow 3-year history estimate ▾
Tracked (3 weeks) Pre-tracking estimate (32 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.
More by Cornelsen Verlag GmbH
View all →📦 Portfolio summaryINDIE studio
13apps·$4K/mocombined
✓ Diversified — top app contributes 34%; risk spread across portfolio
About this analysis
Why low confidence: only 4 ratings · no founder-verified revenue (model estimate only) · revenue figure is directional only.
📌 Final verdict — read this before you trust the numbers above
Grammatik aktiv A1-B1 Deutsch is a very early-stage iOS app in the news space with weak public traction — only 4 ratings, no founder-verified MRR, and not ranked in any monitored grossing chart. The app appears to be monetised, but public signals are too sparse for a precise revenue estimate.
Bottom line: treat all revenue, audience and acquisition-value numbers on this page as directional only — not founder-verified facts.
❓ Frequently Asked Questions
7 answers · auto-generated from this app's public dataHow much does Grammatik aktiv A1-B1 Deutsch make per month?▴
Low-confidence model estimate. Grammatik aktiv A1-B1 Deutsch has only 4 App Store ratings, so our revenue model has very little signal to work with — treat the ~$131/mo figure as directional only, not a verified MRR. No founder-verified revenue data is available for this app. See methodology for the formula and confidence bands.
What apps are like Grammatik aktiv A1-B1 Deutsch?▴
Browse the full News 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 Grammatik aktiv A1-B1 Deutsch built with?▴
Our heuristic places Grammatik aktiv A1-B1 Deutsch on the Native iOS (SwiftUI) stack (High confidence, 80%). Signals: app bundle size, category context, store-description markers, release-date era. We don't disassemble binaries. Alternative possibilities: Native iOS (Swift / UIKit).
Is Grammatik aktiv A1-B1 Deutsch still actively maintained?▴
Maintenance status: Active (15% abandonment risk). Last shipped version was 17 days ago. The risk score combines time-since-last-update with Editor's Choice / curated featuring + user-base maturity adjustments.
When was Grammatik aktiv A1-B1 Deutsch last updated?▴
Grammatik aktiv A1-B1 Deutsch last shipped a new version on 2026-05-07 — less than a month ago. This is the date Apple / Google last accepted a new build, not a content-only push.
Who makes Grammatik aktiv A1-B1 Deutsch?▴
Grammatik aktiv A1-B1 Deutsch is published by Cornelsen Verlag GmbH 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 Grammatik aktiv A1-B1 Deutsch's BU Score?▴
Grammatik aktiv A1-B1 Deutsch has a BU Score of 33/100 (Emerging). The score combines App Store rating, ratings count, monetization model and revenue signals calibrated against founder-verified MRR anchors. See the BU Score formula.