Comparison

AudioStretch vs THE FEEL BOOK

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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

About

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.

Highlights
  • 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
Features
Currently charting
Read full description

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

AudioStretch4 screens
THE FEEL BOOK4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 4 level
AudioStretch versus THE FEEL BOOK: the parameters behind the verdict, then further details
ParameterAudioStretchTHE FEEL BOOK
Price$9.99Free — better
Rating4.4 (230 ratings)4.4 (55 ratings) — better
Positive reviews88.5% of reviews — better71.1% of reviews
Number of ratings230 — better55
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#69 — better#175
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better15.6
Further details — not scored
Size18 MB73 MB
Age rating4+4+
DeveloperCognosonic Pte Ltd2XJ VENTURES LLC

Customer experience

AudioStretch

All ratings223 ratings
Positive83.9%
Neutral6.3%
Negative9.9%
Written reviews410 reviews
Positive88.5%
Neutral5.1%
Negative6.3%

THE FEEL BOOK

All ratings51 ratings
Positive84.3%
Neutral5.9%
Negative9.8%
Written reviews45 reviews
Positive71.1%
Neutral6.7%
Negative22.2%

In-app purchases

None

AudioStretch

No in-app purchases

3 purchases

THE FEEL BOOK

Subscriptions3
  • Monthly subscription3 Days trial$6.991 Month
  • Quarterly Subscription7 Days trial$16.493 Months
  • Annual Subscription14 Days trial$47.901 Year

Questions

Is AudioStretch free?
AudioStretch costs $9.99, with no in-app purchases.
Is THE FEEL BOOK free?
THE FEEL BOOK is free to download, with in-app purchases available.
Which has better reviews, AudioStretch or THE FEEL BOOK?
THE FEEL BOOK is rated higher. AudioStretch averages 4.4 out of 5 from 230 ratings, while THE FEEL BOOK averages 4.4 from 55 ratings.
Do AudioStretch or THE FEEL BOOK have ads?
Neither AudioStretch nor THE FEEL BOOK shows ads.
Which is updated more often, AudioStretch or THE FEEL BOOK?
AudioStretch ships an update every 3 months, and THE FEEL BOOK every 2 weeks. Most recently, AudioStretch was updated on October 29, 2026 and THE FEEL BOOK on October 30, 2026.
Which is more popular, AudioStretch or THE FEEL BOOK?
AudioStretch currently peaks at #69 in the App Store charts, and THE FEEL BOOK at #175. Chart position reflects recent download velocity rather than total install base.

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