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  3. Theory Lessons
Theory Lessons icon

Theory Lessons

musictheory.net, LLC

Theory Lessons features 39 music theory lessons from musictheory.net, presented in their original animated versions.

★ 4.4 (127)Paid #92 USLast observed chart rank per day over 14 days. Taller is better (#1 is tallest). Hollow bars mean no observation.2026-09-02 no data2026-09-03 no data2026-09-04 no data2026-09-05 no data2026-09-06 no data2026-09-07 no data2026-09-08 no data2026-09-09 no data2026-09-10 no data2026-09-11 no data2026-09-12 no data2026-09-13 no data2026-09-14 no data2026-09-15 #92best rank in the 14 days#92Last 14 days · paid chart rankhollow = no data

RANKS Paid US #92

Screenshots and the icon are reduced copies of the developer’s assets; each opens the App Store page. Removal requests: hello@tesign.com.

AT A GLANCE

USAGE
$2.99 · in-app purchases [unconfirmed] · iOS/iPadOS
GENRE
Music · Education
CURRENT VERSION
3.2.1 ·
DEVELOPER
musictheory.net, LLC ↗
APP STORE
View on the App Store ↗
CATEGORY
MEDIA

A summary, not legal advice.

STORE DESCRIPTION

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 Chor…

The opening of the App Store description as stored, at most 600 characters. Written by the developer; formatting is not rendered.

RATING · RATING COUNT TREND

  1. ★ 4.4127

The last observation of each day. A sudden jump in the count can be rating inflation — read it next to the rank change.

TIMELINE

  1. Released on the App Store
  2. Current version released
  3. First observed on a chart by TESIGN

AI chooses the lists under the owner’s delegation. No human review is running in September 2026. Total stars, increases, cross-source signals, last updates and licences are shown as evidence. How ranks work →

If this app gets editorial text (why, build, who, start, caveat) it becomes an edited entry. Until then the page shows only Apple’s public store information and our observed numbers.

App Store is a service mark of Apple Inc. Apple and the Apple logo are trademarks of Apple Inc. · Chart and rating source: Apple (top 100 free/paid per country, observed twice a day)