AudioStretch vs THE FEEL BOOK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AudioStretch
This tool allows musicians to slow down, loop, and transpose music from audio or video files. It's designed to help users learn songs by ear, experiment with sounds, or simply explore their music library in new ways.
- Import audio or video files
- Capture video with phone camera
- Change speed without changing pitch
- Transpose any music
- Loop difficult sections
- LiveScrub waveform listening
- Keyboard/spectrum transcription aid
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Before you buy AudioStretch, consider first downloading AudioStretch Lite for FREE. Apart from some feature limitations, it's the same as the full (paid) version. The Lite version is a great way to see whether AudioStretch works well for you. As a musician one of the most helpful tools you can have is the ability to slow-down, loop or auto-transpose the notes for a piece of music you are trying to learn. AudioStretch is the world’s first audio and video transcription tool. Now you can manipulate the pitch, speed and transcribe your tunes from both audio and video files; or by using your phone’s camera you can capture video directly into AudioStretch and transcribe it! FEATURES INCLUDE: • Import audio or video files • Capture video with your phone camera for transcription • Change the speed of files without changing the pitch • Listen to the individual notes as you drag the waveform • Play audio and video at zero speed • Transpose any music • Loop difficult to learn sections With AudioStretch you get all of this in an incredibly responsive and easy-to-use app. Ideal for transcription, learning songs by ear, crazy sonic experimentation, or just listening to your music library in a new way. DETAILED FEATURES: • Load songs from your Music Library. (Note: songs from Apple Music have DRM and therefore cannot be loaded). • Document Picker import/export option supports iCloud, OneDrive, and more • Open Dropbox files and email attachments via "Open In" • LiveScrub™ : listen as you drag/hold the waveform • Speed range -10x to 10x, including zero speed! • Instant freeze to zero speed by double-tapping on speed display • Pitch shift range +/- 36 semitones • Keyboard/spectrum feature for transcription • Super-fine speed/pitch adjustment via drag left-right on speed/pitch display • Flexible looping feature • No ads or in-app purchases If you run into any problems with AudioStretch or AudioStretch Lite, please contact support@audiostretch.com
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 AudioStretch's $9.99. THE FEEL BOOK also leads on update cadence (every 2 weeks vs every 3 months). AudioStretch's advantage is in-app purchases (none vs 3) and review sentiment (89% vs 71%). On rating, ads, chart position and device support 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; AudioStretch costs $9.99 up front. THE FEEL BOOK sells 3 in-app purchases, starting at $6.99 per month. AudioStretch asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.4 for AudioStretch against 4.4 for THE FEEL BOOK. Both are backed by a comparable volume of ratings — 230 and 55 respectively. Written reviews are what separate them: 89% of AudioStretch's written reviews are positive against 71% of THE FEEL BOOK's.
AudioStretch ships an update every 3 months, THE FEEL BOOK every 2 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.
| Parameter | AudioStretch | THE FEEL BOOK |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 4.4 (230 ratings) | 4.4 (55 ratings) — better |
| Positive reviews | 88.5% of reviews — better | 71.1% of reviews |
| Number of ratings | 230 — better | 55 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #69 — better | #175 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 18 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Cognosonic Pte Ltd | 2XJ VENTURES LLC |
Customer experience
AudioStretch
THE FEEL BOOK
In-app purchases
AudioStretch
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







