flowkey – Klavier lernen
81
Quality Score
Excellent
flowkey – Klavier lernen
High confidence
✍️ bumetric analysis
“
flowkey – Klavier lernen is an iOS app from flowkey GmbH in the Education category, currently rated 4.7★ across 63,381 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.
Quality Score is 81: 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
$26.2K
per month
→
12-mo forecast
$27.2K – $56.9K
per month
→
24-mo forecast
$33.6K – $100.9K
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
$90K
↳ What it cost to build · not monthly revenue
Likely range $70K – $120K
$25K · MVP floor
$100K · indie scale
$500K+ · studio build
📈
Pays back in ~3 months 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 (111 MB) | +$24K |
| ⚙ Education complexity ×1.20 | +$15K |
Total estimate
$90K
ONE-TIME · EXIT VALUE
💵 Estimated acquisition value
$475K
↳ What it would sell for · not monthly revenue
Marketplace range $350K – $600K · 18× MRR multiple
💸
~5.3× return on build cost
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 |
| ⭐ ★ rating ≥ 4.7 (premium) | +15% |
| 🏷 Education category multiple | +6% |
Final multiple
18× MRR
👥 Estimated audience size
5.3M
Lifetime downloads (US-equivalent)
Monthly active
960K
Daily active
285K
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 |
| 🔁 Education D30 retention | 18% |
| 📍 DAU / MAU stickiness | 0.30 |
DAU / MAU
30% sticky
🔬
How we forecast this revenue
MEDIUM CONFIDENCEBaseline
$26.2K/mo · ML-estimated from 234 triggers
Growth rate
+4.0% MoM · MID tier baseline (compound monthly)
6 months
$24.9K – $41.5K
12 months
$27.2K – $56.9K
24 months
$33.6K – $100K
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 · 49/100MID TIERunderperforming peersGrowth Velocity
5.0
Founder Strength
3.0
Product Quality
9.4
Revenue Strength
4.4
Monetization Maturity
1.0
Defensibility
4.5
Market Position
2.0
Operational Safety
10.0
- 💰 Revenue: Modest — $18K - $39K/mo · MID tier · medium confidence, trajectory unclear.
- ⭐ Quality: 4.72★ across 63,381 reviews — exceptional (top 1% in category).
- 📍 Market: Not yet charting in any of the 9 monitored markets.
- 📈 Growth: Insufficient signal to assess trajectory.
- ⚠️ Risk: Low — 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 = $472K-$839K.
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 12 of 12 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Mid install base (63,381 ratings)METRIC | +$5,500 | |
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| cancelledREVIEW | −$1,500 | |
| Mature app (10y old)METRIC | +$1,500 | |
| Multilingual (11 languages)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| too expensiveREVIEW | −$1,000 | |
| priceyREVIEW | −$800 |
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 · v2.108.2
Now is the best time to learn something new! We have improved the learning experience and added inspiring new songs for you. This version also contains bug fixes and improves the app performance.
Your flowkey team
Your flowkey team
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- flowkey – Klavier lernen
- Developer
- flowkey GmbH
- Bundle ID
- com.flowkey.app
- App Store URL
- Open in App Store
- Category
- Education
- Content rating
- 4+
- Languages
- EN, FR, DE, IT, JA, KO, PT, RU, ZH, ES, ZH
Company
- Website
- Not found
- Tagline
- Play the music you love
- Description
- Learn all there is to know about notes, chords, and proper piano technique. Get started today and play your first song.
- 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
- $26.2K/mo
- Top-grossing rank
- 🇩🇪#25 /100 🇦🇺#35 /100 🇫🇷#44 /100 🇬🇧#53 /100 🇨🇦#80 /100 🇯🇵#91 /100 🇺🇸#92 /100
- 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/flowkeyDE · instagram instagram.com/flowkey · tiktok tiktok.com/@flowkey · youtube youtube.com/user/flowkeychannel
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- flowkey.com/en/about
📈Ratings growth63,789 ratings+12% lifetimeShow 3-year history estimate ▾
Tracked (47 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Top Countries — Grossing Rank8 countries
🇩🇪DE#25 /100
🇦🇺AU#35 /100
🇫🇷FR#44 /100
🇬🇧GB#53 /100
🇨🇦CA#80 /100
🇯🇵JP#91 /100
🇺🇸US#92 /100
🇧🇷BR#98 /100
📊Category Rank Trajectory#25 now · best #23 · worst #100
Lower line = better rank · Estimate from ratings growth model · Lower position on chart = worse rank · Higher = top of chart
🚀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
flowkey makes it fun and easy to play your favorite songs on piano – whether you’re a complete beginner or an experienced player. All songs and courses are created by professional pianists, with interactive lessons, practice tools, and instant feedback to help you learn piano the way that works for you.
Choose from thousands of beautifully-arranged piano pieces covering all genres, including: Classical, Pop, Film & TV and more. With songs available in four difficulty levels, you’ll always find new pieces to play.… View full description on the official store →
Choose from thousands of beautifully-arranged piano pieces covering all genres, including: Classical, Pop, Film & TV and more. With songs available in four difficulty levels, you’ll always find new pieces to play.… View full description on the official store →
App Specs
🔐 Own this app? Claim & verify MRR →💾 111 MB🔞 4+📱 iOS 15.6+🔖 v2.108.2🔄 updated 0d ago🌐 EN, FR, DE, IT, JA +6📂 Education💰 Free
📅
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
⭐
Rating ↑ 3.44 → 4.72 (improved 1.28★)
2026-05
📈
Crossed 1,000 ratings — social-proof flywheel kicking in
2026-03
⭐
Rating ↓ 4.60 → 3.44 (dropped 1.16★)
2026-03
⭐
Rating ↑ 3.44 → 4.60 (improved 1.16★)
2026-03
📈
Crossed 500 ratings — social-proof flywheel kicking in
2023-09
📈
Crossed 100 ratings — social-proof flywheel kicking in
2023-05
📈
Crossed 50 ratings — social-proof flywheel kicking in
2023-01
📈
Crossed 10 ratings — social-proof flywheel kicking in
2023-01
⭐
Rating ↓ 4.20 → 3.83 (dropped 0.37★)
2022-12
⭐
Rating ↓ 5.00 → 4.20 (dropped 0.80★)
2022-12
🚀
First tracked snapshot — initial data captured
🧪
Tech & Domain Intel — flowkey.com
- Mail provider
- Google Workspace
- Tech stack
- Anthropic · Apple Pay / Sign in with Apple · Google Workspace · Mailgun
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 |
|---|---|---|---|
| 🇦🇺 AU | 4.63849★ | 7,751 | 4.63849★ this version |
| 🇧🇷 BR | 4.80055★ | 2,562 | 4.80055★ this version |
| 🇨🇦 CA | 4.63389★ | 8,511 | 4.63389★ this version |
| 🇩🇪 DE | 4.64433★ | 24,964 | 4.64433★ this version |
| 🇫🇷 FR | 4.63388★ | 10,767 | 4.63388★ this version |
| 🇬🇧 GB | 4.66585★ | 17,082 | 4.66585★ this version |
| 🇮🇳 IN | 4.60016★ | 1,258 | 4.60016★ this version |
| 🇯🇵 JP | 4.4932★ | 8,303 | 4.4932★ this version |
| 🇺🇸 US | 4.71554★ | 63,738 | 4.71554★ this version |
🔔
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📝 Description
95
BU Score · Transcendent
Full revenue analysis
Read the article-style breakdown for flowkey – Klavier lernen: 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: 63,381 ratings · no founder-verified revenue (model estimate only).
❓ Frequently Asked Questions
4 answers · auto-generated from this app's public dataHow much does flowkey – Klavier lernen make per month?▴
Based on our ML-calibrated revenue forecast, flowkey – Klavier lernen earns approximately $26K/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.
What apps are like flowkey – Klavier 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.
Who makes flowkey – Klavier lernen?▴
flowkey – Klavier lernen is published by flowkey 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 flowkey – Klavier lernen's BU Score?▴
flowkey – Klavier lernen has a BU Score of 81/100 (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.