Comparison

iStroboSoft 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

iStroboSoft

This application provides highly accurate tuning for musical instruments, offering professional-grade precision with a real-time strobe display. It supports various tuning modes, temperaments, and input methods, making it suitable for both acoustic and electric instruments.

Highlights
  • 1/10th cent accuracy
  • Real-time strobe display
  • Guided Mode Tuning
  • 12 Temperaments with adjustable root
  • Assisted Low Note Detection
  • Drop/Capo mode
  • Adjustable Concert A
Features
Read full description

Usage questions? ***Please contact us before posting an issue in the reviews.*** Peterson Support at info@strobosoft.com or call 708.388.3311 M-F 8am-5pm (CST) TRUSTED BY PROFESSIONALS FOR OVER 70 YEARS. ---iStroboSoft for iOS--- Peterson Strobe Tuners' popular StroboSoft tuning application for iPhone and iPad. iStroboSoft™ offers the unmatched accuracy of a mechanical strobe tuner for the highest degree of precision available in a software tuning application. Plug in and tune your electrics and acoustics quickly and easily with 1/10th cent accuracy. Peterson Tuners has offered tuning solutions for over 70 years and is the only company specializing in hardware and software tuning products for all levels of musicians. FEATURES: • Stand-by mode to reduce battery usage or freeze the display. • Guided Mode Tuning offers an alternate strobe display that slows the strobe bands one-by-one as you come closer to tune. • Speed control for strobe display; dampen the response for a longer note display. • 12 Temperaments with adjustable root control. • Display all sharps note display. • Assisted Low Note Detection (ALND) helps capture very low frequencies. • Mains hum filter option reduces the chances of the tuner latching on to 50 or 60Hz cycle hum when using a direct line-in connection or while using the app during device charging. • Smooth, real-time strobe display allows you to achieve an unmatched level of accuracy. • Note/Octave window displays the correct note and octave for the note being tuned. • Cents display allows you to see how far out of tune your note is in cent values. • Tune in auto or manual mode. • Toggle the display to show: cents, Hz, MIDI note value for the note being tuned. • Glowing flat/sharp indicators assist when tuning a note very far from the target position. • Noise filter: Use the noise filter when utilizing an external mic or clip-on tuning device to help reduce the effect of extraneous environmental noise during tuning. • Input boost: The input boost will raise all input frequencies by +24dB. • Calibration mode: iStroboSoft can be calibrated to an external source guaranteeing 1/10th cent accuracy. • Drop/Capo mode: iStroboSoft will auto-transpose notes up or down to one full octave. • Adjustable Concert A: Change the Concert A reference of the tuner to accommodate tuning to a fixed instrument, such as a piano, or tune instruments that do not utilize the typical Western A440 reference. • Full screen mode permits the strobe display to be maximized on screen to allow better viewing from a distance. • Change strobe display colors to accommodate different lighting environments or set a preferred user color for those with limited color palette recognition. Use the built-in mic on your device for tuning or connect directly via the headphone jack using an approved adaptor cable or interface. Devices without a headphone jack can connect a pickup or mic using the lightning-to-audio adaptor. Support via email at: info@strobosoft.com or call 708.388.3311 M-F 8am-5pm (CST)

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
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

iStroboSoft4 screens
THE FEEL BOOK4 screens

Verdict

The call

The clearest difference is price: THE FEEL BOOK at Free against iStroboSoft's $9.99. iStroboSoft's advantage is chart position (#15 vs unranked) and ratings volume (298 vs 55). On rating, review sentiment, 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

CostPrice · In-app purchases · Ads · Monetization

THE FEEL BOOK is free to download; iStroboSoft costs $9.99 up front. iStroboSoft sells 11 one-off in-app purchases and THE FEEL BOOK sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for iStroboSoft against 4.4 for THE FEEL BOOK. That said, the two scores are not equally well evidenced: iStroboSoft has 298 ratings behind it against 55, so its average is the more settled of the two. Written reviews are what separate them: 76% of iStroboSoft's written reviews are positive against 71% of THE FEEL BOOK's.

UpkeepUpdate frequency

iStroboSoft ships an update fortnightly, THE FEEL BOOK every 2 weeks. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

Scorecard4 real differences · 7 level
iStroboSoft versus THE FEEL BOOK: the parameters behind the verdict, then further details
ParameteriStroboSoftTHE FEEL BOOK
Price$9.99Free — better
Rating4.3 (298 ratings)4.4 (55 ratings) — better
Positive reviews76.0% of reviews — better71.1% of reviews
Number of ratings298 — better55
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#15 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS12.0 — better15.6
Further details — not scored
Size5 MB73 MB
Age rating4+4+
DeveloperPeterson Tuners2XJ VENTURES LLC

Customer experience

iStroboSoft

All ratings298 ratings
Positive81.5%
Neutral4.4%
Negative14.1%
Written reviews363 reviews
Positive76.0%
Neutral6.3%
Negative17.6%

THE FEEL BOOK

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

Bugs and requests

iStroboSoft

Reported bugs

3 issues
  • App freezes or crashes on certain iOS versions
  • Incorrect note detection on some instruments
  • Display issues with newer iPhone/iPad models

Requested features

5 requests
  • Add support for more sweetened tunings and temperaments
  • Improve display visibility and layout for newer devices
  • Integrate with audio apps and allow routing through other apps
  • Add Apple Watch app for quick tuning access
  • Improve noise filtering and input sensitivity

THE FEEL BOOK

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

iStroboSoft

One-time11
  • Extended Frequency Modes$4.99
  • Bluegrass Sweeteners$5.99
  • Buzz Feiten Pack$5.99
Show 8 more
  • Guitar & Bass Sweeteners$5.99
  • Orchestral Sweeteners$5.99
  • World Sweetener Pack$9.99
  • Tuning Tools$9.99
  • Steel Guitar Sweeteners$14.99
  • Harmonic Tuning$19.99
  • Keyboard Sweeteners$19.99
  • Full Discounted Upgrade Pack$59.99
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 iStroboSoft free?
iStroboSoft costs $9.99, and also offers in-app purchases.
Is THE FEEL BOOK free?
THE FEEL BOOK is free to download, with in-app purchases available.
Which has better reviews, iStroboSoft or THE FEEL BOOK?
THE FEEL BOOK is rated higher. iStroboSoft averages 4.3 out of 5 from 298 ratings, while THE FEEL BOOK averages 4.4 from 55 ratings.
Do iStroboSoft or THE FEEL BOOK have ads?
Neither iStroboSoft nor THE FEEL BOOK shows ads.
Which is updated more often, iStroboSoft or THE FEEL BOOK?
iStroboSoft ships an update fortnightly, and THE FEEL BOOK every 2 weeks. Most recently, iStroboSoft was updated on October 23, 2026 and THE FEEL BOOK on October 22, 2026.

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