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41
BU Score
Emerging

Speedy Note: Bassschlüssel

3.7 ✍️ Editor
✍️ bumetric analysis

Speedy Note: Bassschlüssel is an iOS app from Brian Hughes in the News category, currently rated 3.7★ across 6 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Our BU Score puts it at 41: Emerging (early traction worth watching). For a News app, that means early traction worth watching.

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

📊 Performance Tracking LIVE

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idle
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Rating
Reviews
Forecast Revenue / mo
Snapshots tracked
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since first record
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💰 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 4 of 4 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Mature app (12y old)METRIC
+$1,500
Localized (9 languages)METRIC
+$600
Pre-traction phase (6 ratings)METRIC
−$300
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.

⭐ 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 →
💾 23 MB🔞 4+📱 iOS 14.5+🔖 v1.9🔄 updated 4y ago🌐 EN, FR, DE, IT, JA +4📂 News💰 Paid🚀 Launched 2014 (12y old)

📝 About this app

Speedy Note: Bass Clef teaches you to read the Bass Clef (F Clef) in an interactive, fun and competitive game environment. Great for beginners to advanced, children or adults. Master the six levels and you have mastered the Bass Clef! Compete with yourself or with your friends. Speedy Note tracks your scores and lets you know how you are doing.

Speedy Note also allows you to learn at your own pace – you decide the level of difficulty and when to advance to more difficult levels.

Speedy Note: Bass Clef is very intuitive. It only takes a few moments to learn how to use (even for young children).

FEATURES:
Speedy Note is MIDI compatible. You can use your midi instrument to play the game and learn the notes. (Requires a MIDI interface connected through the lightening port or a Bluetooth LE MIDI device.)

CD quality piano sounds.

Can be used silently allowing you to practice learning notes anywhere, any time. (No need to turn down or off your device’s volume.)

You can learn either using alphabetic notation (A, B, C, D, E, F, G) or Solfege notation (Do, Re, Mi, Fa, Sol, La, Si).

Created by Bienelle Music.

Created by Bienelle Music

🆕 What's New · v1.9

Speedy Note is now compatible with iOS 14.5 or higher.

Speedy Note accepts MIDI input either hardwired through the Lightning port (you will need a midi interface) or using a Bluetooth LE MIDI device.

Silent mode.

Profile & Insights

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

Identification

App name
Speedy Note: Bassschlüssel
Developer
Brian Hughes
Bundle ID
com.tlcmusic.Speedy-Bass
App Store URL
Open in App Store
Category
News
Content rating
4+
Languages
EN, FR, DE, IT, JA, KO, RU, ZH, ES

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
$201/mo
Top-grossing rank
Outside top 100 in US News
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
Not found
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/id1884836200
📈Ratings growth6 ratings+500% lifetimeShow 3-year history estimate ▾Feb 2014Oct 2024May 2026
Tracked (6 weeks) Pre-tracking estimate (37 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.

Similar apps in News

Full revenue analysis
Read the article-style breakdown for Speedy Note: Bassschlüssel: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
Read deep-dive →