Music Theory Basics vs 5ths Machine
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Music Theory Basics
Learn and test your knowledge of music theory concepts including notes, key signatures, intervals, chords, and rhythms. Save and print your quiz results with a built-in grade book.
- Tests notes, key signatures, intervals, chords, and rhythms
- Supports multiple clefs (Treble, Alto, Tenor, Bass)
- Customizable quiz options
- Detailed grade book for saved results
- Printable and shareable results
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Music theory covering Notes (Notation / Piano), Key Signatures, Intervals, Chords, and Rhythms, that tests basic musicianship skills. Includes a 'Grade Book' list of all saved results that you can print or send. • All pitched quizzes support Treble, Alto, Tenor and Bass clefs. • Interval and chord roots can be random or user set for each question. • Set a specific number of questions or grade only the number answered. Notes module tests music notation and piano keyboard knowledge. Key Signatures covers major and minor keys. Set separate maximum number of sharps or flats for the quiz. Intervals includes simple intervals played harmonically, melodically up or down. Intervals covered are major, minor, diminished, augmented 2nds, 3rds, 6ths, 7ths, and diminished, perfect, and augmented 4ths, 5ths, and octaves. You can include or exclude diminished and augmented 2nds, 3rds, 6ths and 7ths. Chords include triads and seventh chords played harmonically, melodically up, down or broken. Triads are major, minor diminished and augmented. Seventh Chords are dim7, min7(b5), min7, min(maj7), dominant7, maj7, dominant7(#5), maj7(#5). Rhythms tests your rhythmic skills. - Customizable options include; up to 16 measures in 2/4, 3/4, 4/4 or 5/4, up to 3 pitches, include specific note/rest values, and exclude grading durations (for percussionists). - Included note/rest values: Whole, Half, Quarter, Eighth, Sixteenth, Dotted Half, Dotted Quarter, Dotted Eighth, Triplet Half, Triplet Quarter, and Triplet Eighth. The Grade Book is filterable by name. Grades include the name, date and time the quiz was taken, all relevant settings (clef, number of questions, etc.), and score (percentage and letter grade).
5ths Machine
Explore the theoretical intricacies of key signatures with an interactive quiz. Learn about the 12-position equal temperament system and discover how to identify keys with an unusual number of sharps. Understand music theory through a unique perspective.
- Key signature quiz
- Equal temperament system explanation
- Theoretical key signature exploration
- Background information on music theory
- Quiz tips and strategies
- Chronology of music theory concepts
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Think you know your key signatures cold? Answer this: which key has 41 sharps? The equal temperament system is a circle with 12 positions, just like a clock. And, just like on a clock, the hands keep going around and around forever. The key signature of 41 sharps is theoretically consistent with the Western diatonic system ― learn why, and learn how to find out what key it is. The Background Information and the Quiz Tips explain the system in detail, and Chronology puts it all in perspective. Enjoy the “Perpetual 5ths Machine Boogie” while key signatures you’ve never seen before pass by on parade. Then, buckle down and solve the Quiz questions. NOW you understand music theory the 5ths Machine way!
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Verdict
The clearest difference is rating: 5ths Machine at 5.0 against Music Theory Basics's 4.3. 5ths Machine also leads on price ($1.99 vs $3.99) and device support (3 vs 1). Music Theory Basics's advantage is ratings volume (6 vs 1). On update cadence, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Music Theory Basics costs $3.99 and 5ths Machine $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
5ths Machine holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Music Theory Basics has 6 ratings behind it against 1, so its average is the more settled of the two.
Music Theory Basics ships an update every 34 months, 5ths Machine every 24 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Music Theory Basics | 5ths Machine |
|---|---|---|
| Price | $3.99 | $1.99 — better |
| Rating | 4.3 (6 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 6 — better | 1 |
| Update frequency | Every 34 months | Every 24 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 48 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Patrick Q. Kelly | Lucy Hudson |
Customer experience
Music Theory Basics
5ths Machine
In-app purchases
Music Theory Basics
No in-app purchases
5ths Machine
No in-app purchases
Questions
Is Music Theory Basics free?
Is 5ths Machine free?
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