55
BU Score
Solid
Theory Lessons
✍️ BU Analytics Review
“
Theory Lessons is an iOS app from musictheory.net in the Travel category, currently rated 4.4★ across 126 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 55 — Solid (established niche player). For a Travel app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
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 9 of 9 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($2.99)METRIC | +$2,800 | |
| 5 starREVIEW | +$1,800 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (14y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| Good rating (4.4★)METRIC | +$800 | |
| Early-stage install base (126 ratings)METRIC | +$400 | |
| Single-language (English only)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.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Jun 24
Dec 24
Oct 25
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 4 MB🔞 4+📱 iOS 15.8+🔖 v3.2.1🔄 updated 3w ago🌐 EN📂 Travel💰 Paid🚀 Launched 2012 (14y old)
📝 About this app
Theory Lessons features 39 music theory lessons from musictheory.net, presented in their original animated versions.
Complete lesson list:
• The Staff, Clefs, and Ledger Lines
• Note Duration
• Measures and Time Signature
• Rest Duration
• Dots and Ties
• Steps and Accidentals
• Simple and Compound Meter
• Odd Meter
• The Major Scale
• The Minor Scales
• Scale Degrees
• Key Signatures
• Key Signature Calculation
• Generic Intervals
• Specific Intervals
• Writing Intervals
• Interval Inversion
• Introduction to Chords
• Triad Inversion
• Seventh Chords
• More Seventh Chords
• Seventh Chord Inversion
• Diatonic Triads
• Roman Numeral Analysis: Triads
• Diatonic Seventh Chords
• Roman Numeral Analysis: Seventh Chords
• Composing with Minor Scales
• Voicing Chords
• Analysis: O Canada
• Nonharmonic Tones
• Phrases and Cadences
• Circle Progressions
• Common Chord Progressions
• Triads in First Inversion
• Triads in Second Inversion
• Analysis: Auld Lang Syne
• Building Neapolitan Chords
• Using Neapolitan Chords
• Analysis: Moonlight Sonata
Complete lesson list:
• The Staff, Clefs, and Ledger Lines
• Note Duration
• Measures and Time Signature
• Rest Duration
• Dots and Ties
• Steps and Accidentals
• Simple and Compound Meter
• Odd Meter
• The Major Scale
• The Minor Scales
• Scale Degrees
• Key Signatures
• Key Signature Calculation
• Generic Intervals
• Specific Intervals
• Writing Intervals
• Interval Inversion
• Introduction to Chords
• Triad Inversion
• Seventh Chords
• More Seventh Chords
• Seventh Chord Inversion
• Diatonic Triads
• Roman Numeral Analysis: Triads
• Diatonic Seventh Chords
• Roman Numeral Analysis: Seventh Chords
• Composing with Minor Scales
• Voicing Chords
• Analysis: O Canada
• Nonharmonic Tones
• Phrases and Cadences
• Circle Progressions
• Common Chord Progressions
• Triads in First Inversion
• Triads in Second Inversion
• Analysis: Auld Lang Syne
• Building Neapolitan Chords
• Using Neapolitan Chords
• Analysis: Moonlight Sonata
🆕 What's New · v3.2.1
- Fixes an issue where opening a link to a lesson could fail.
- Updates the app icon used in Dark, Clear, or Tinted modes.
- Fixes an issue where the wrong image would show in "The Staff, Clefs, and Ledger Lines".
- Corrects typographical errors in "The Minor Scales", "Diatonic Seventh Chords", and "Roman Numeral Analysis: Seventh Chords".
- Updates the app icon used in Dark, Clear, or Tinted modes.
- Fixes an issue where the wrong image would show in "The Staff, Clefs, and Ledger Lines".
- Corrects typographical errors in "The Minor Scales", "Diatonic Seventh Chords", and "Roman Numeral Analysis: Seventh Chords".
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Theory Lessons
- Developer
- musictheory.net
- Bundle ID
- net.musictheory.TheoryLessons
- App Store URL
- Open in App Store
- Category
- Travel
- Content rating
- 4+
- Languages
- EN
Company
- Website
- www.musictheory.net
- Tagline
- Not found
- Description
- Introductory and intermediate music theory lessons, exercises, ear trainers, and calculators.
- 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
- $373/mo
- Top-grossing rank
- Outside top 100 in US Travel
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- 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
- https://www.musictheory.net/news
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- https://www.musictheory.net/contact
- About page
- Not found
📈Ratings growth126 ratings+31% lifetimeShow 3-year history estimate ▾
Tracked (60 weeks) Pre-tracking estimate (36 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.
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