ScaleMate vs THE FEEL BOOK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ScaleMate
This app provides an interactive reference for understanding music scales and jazz harmony. It allows users to hear, visualize, and manipulate scales to deepen their comprehension of musical concepts. Features include expert write-ups, practical usage tips, and animated transformations between scales.
- Hear scales as melodies
- Visualize scales on circle of fifths
- Expert scale write-ups
- Manipulate scales and hear changes
- Full library of scales
- Automatic scale recognition
- Animated scale transformations
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ScaleMate is a modern, interactive reference to jazz harmony. ScaleMate lets you… HEAR SCALES conventionally or as random melodies. VISUALIZE SCALES in ways that help you understand them deeper. READ & LEARN through built-in, expert scale write-ups & use tips. MANIPULATE SCALES while you listen. Hear the effects instantly to understand how scales differ. ————————————————— ScaleMate is a reference that shows you & plays for you any scale you wish…. But that's just the beginning. ScaleMate helps you hear & understand scales and harmony more deeply… by teaching you to visualize scales in ways that match what they sound like. Imagine… Wouldn't it be nice to have a single image to understand all the modes of the major scale? Ever wonder why the modes are ordered so oddly, hopping between major & minor & dominant? Or notice that the Altered Scale is the "darkest", most minor sounding of all possible dominant scales? Or that its tritone-substitution, the Lydian Dominant Scale, is the "brightest" of them all? Ever notice that the minor pentatonic scale is a mode of the major pentatonic scale and wonder whether there were any other useful pentatonic modes? Ever notice that the major pentatonic scale (and its modes) are the only 5-note scale that doesn't contain any half steps or tritones? ScaleMate shows you scales in a way that makes these observations natural and immediate… and plays you the results too. Or ever just wonder what the definition of a dominant chord is and which common scales can be used for them? ScaleMate's got you covered. ——————— FEATURES ——————— USE IT RIGHT AWAY Use ScaleMate right now! Built-in help is there for you whenever you want it. LISTEN ScaleMate lets you hear what scales sound like, by playing them up & down, or by playing random melodies that use them. VISUALIZE WHAT YOU HEAR ScaleMate shows every scale both linearly (for melodic understanding) and on the circle of fifths (for harmonic understanding). FULL LIBRARY OF SCALES ScaleMate knows all the scales you're ever likely to encounter. A WELLSPRING OF KNOWLEDGE Extensive info pages on 60+ of the most common & important scales, including practical advice and usage tips. (Over 15,000 words of content.) USE IT TO TEACH ScaleMate is perfect for projecting on a screen or sharing over zoom while you teach. Its animations let you show how one scale transforms into another, and it has special features (pointing, hiding/revealing) for educators. AUTOMATIC SCALE RECOGNITION Build your own scales and ask yourself "what if I make this change…" Whenever you produce a conventional scale, ScaleMate will automatically identify it for you by name and tell you about it. ANIMATED IN FRONT OF YOUR EYES Change between one scale and another and see the differences between them, visually animated before you. SMART SPELLING ScaleMate notates perfectly, for every scale in every key. NOTE ROLES Next to each note, ScaleMate displays its function—in numbers (3, 5, b7) or in solfege (Mi, Sol, Te) or not at all, according to your preference. SIMPLE OR ADVANCED NOTATION ScaleMate shows you double flats and double sharps whenever they're called for… unless you'd rather see simpler note names. Prefer never to see notes like Cb and E#? You can have ScaleMate show them as B and F. DIMINISHED HARMONY Choose the option to color the notes in three colors so you can see which diminished seventh chord every note belongs to. Great for understanding diminished scales & chords and seeing how they relate to other scales too. JAZZ CRED ScaleMate is created by Anton Schwartz. An award-winning saxophonist & composer as well as an expert educator, he is also the creator of the highly rated RANDOM ROOTS app. Terms and conditions: https://scalemate.app/terms-conditions Privacy policy: https://scalemate.app/privacy
THE FEEL BOOK
Practice jazz improvisation with recordings of world-class musicians. Hone your skills with a sophisticated rhythm section and access a growing library of transposable lead sheets. Experiment with advanced features like looping, transposition, and a 3-channel mixer to elevate your musical performance.
- Improvise with a professional rhythm section
- Isolate and study bass lines
- Sophisticated piano harmony
- Transposable lead sheets
- Advanced looping capabilities
- Variable tempo control
- 3-channel instrument mixer
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There is no substitute for the energy and interplay of performing live with world-class jazz heavyweights. But what if everyone had the opportunity to practice along with these very same musicians? To hone their skills with true masters of the art form? THE FEEL BOOK accomplishes this by bringing the greatest musicians on the planet to you. Set aside your robotic recreations and subpar tracks and come play with the greats today! - Improvise over a (super)human rhythm section - Improve your feel and creativity along with a top tier drummer’s ride cymbal. - Play along with (or even isolate and study) a perfectly crafted bass line. - Work over a pianist’s sophisticated harmony based on historical research of the ideal chord changes for each tune. - Carry an expanding library of transposable lead sheets put together by the pros on your smartphone, tablet or laptop The Feel Book transports you to New York and allows you to play with the best from the modern jazz scene while integrating advanced technical features like never before. -Advanced Looping capabilities -Transposition to practice in multiple keys -3 channel mixer to experiment with levels or mute instruments (great for drummers and bassists!) -Variable tempo, to practice slower or test your limits -Global transposition of lead sheets for Bb and Eb instruments Members will have access to the full library (adding at least 10 new tracks each month in a constantly expanding list!) featuring a wide range of styles played by the modern elite (players that have backed everyone from Michael Brecker to Roy Hargrove to Astrid Gilberto!) Players like Willie Jones III, Glenn Zaleski, Danton Boller, Ari Hoenig, Dave Kikoski, Colin Stranahan, Victor Gould, Joe Dyson, Matt Brewer, Rick Rosato, Kiyoshi Kitagawa, Duduka Fonseca, Helio Alves, and Gili Lopes AND MORE to come each month! THE FEEL BOOK - elevating the groove and swing of today’s musician to a new level.
Screenshots
Verdict
The clearest difference is price: THE FEEL BOOK at Free against ScaleMate's $3.99. THE FEEL BOOK also leads on chart position (#180 vs unranked) and device support (4 vs 2). ScaleMate's advantage is in-app purchases (none vs 3) and review sentiment (100% vs 71%). On ratings volume, update cadence and ads 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
THE FEEL BOOK is free to download; ScaleMate costs $3.99 up front. THE FEEL BOOK sells 3 in-app purchases, starting at $6.99 per month. ScaleMate asks for nothing beyond the download.
ScaleMate holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 24 and 55 respectively. Written reviews point the same way: 100% of ScaleMate's written reviews are positive against 71% of THE FEEL BOOK's.
ScaleMate ships an update fortnightly, THE FEEL BOOK every 2 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | ScaleMate | THE FEEL BOOK |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.8 (24 ratings) — better | 4.4 (55 ratings) |
| Positive reviews | 100.0% of reviews — better | 71.1% of reviews |
| Number of ratings | 24 | 55 — better |
| Update frequency | Fortnightly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #180 — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.5 | 15.6 — better |
| Further details — not scored | ||
| Size | 36 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Anton Schwartz | 2XJ VENTURES LLC |
Customer experience
ScaleMate
THE FEEL BOOK
In-app purchases
ScaleMate
No in-app purchases
THE FEEL BOOK
- Monthly subscription3 Days trial$6.991 Month
- Quarterly Subscription7 Days trial$16.493 Months
- Annual Subscription14 Days trial$47.901 Year








