Comparison

iScrudenizer vs PianoTrax

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

Head to head
About

iScrudenizer

This client application connects to a custom MIDI sequencing server for kinetic art installations. It allows users to control playback of pre-programmed compositions, including play, pause, and stop functions. The app requires a specific server setup from Remmy Demmy Productions.

Highlights
  • Connects to custom MIDI sequencing server
  • Controls playback of compositions
  • Play, pause, and stop functions
  • Requires specific server setup
  • Client for kinetic art installations
Features
Read full description

iPhone/iPad client for the custom-made MIDI sequencing server. You should only download this application if you are using it in conjunction with a kinetic art installation that is connected to a sequencing server made by Remmy Demmy Productions. This application can play, pause and stop pre-programmed compositions on the server; but it cannot upload, remove, or change the order of the compositions.

About

PianoTrax

Access a vast library of piano tracks for singers, students, and educators. Customize key and tempo, create playlists, and download MP3s. Ideal for rehearsals, auditions, and performances.

Highlights
  • Purchase and download individual tracks
  • Change key and tempo
  • Browse by category or search
  • Create multiple playlists
  • Melody and piano versions available
  • Custom recordings available
Features
Read full description

*Students who subscribe can access the entire library for auditions and rehearsals. *Professional vocalists can see if audition cuts for the most recent National Tours and Broadway Shows have been recorded. *Singing teachers who subscribe can stream the entire song before they decide if it's a good fit for their students and download it as an Mp3 on their computer hard drive. *Schools and theaters can find entire shows for rehearsals and/or performances. Features: •Purchase and download individual tracks. •Change key and tempo. •Browse by category or search individual titles or shows. •Create multiple playlists. •Add pins to mark the spots you rehearse most, see each pin's time at a glance, and jump between them with a location slider. •Hear a 30-second preview of any song before you sign in or subscribe, and the full song once you do. •We offer free exchanges if you want a new version of the song you've purchased. •There are melody versions to help you learn your song and piano versions when you don't need the guide melody any longer. •When you connect the app to a Bluetooth speaker in "airplane mode" it works well for auditions and self taping submissions. •Larger text sizes are supported throughout the app. •All purchases made from PianoTrax.com will automatically be available in the app. All purchases from the app will instantly be available in your account on the website. •If you can't find the song you need already on the app we can record it for you. Subscription features: - Stream the entire library. - Redeem free Mp3s on your computer. - Monthly subscriptions include 3 Free Mp3s per month. - Annual subscriptions allow the user to redeem 36 Mp3s anytime. - If you need additional Mp3s, you will receive an automatic discount on checkout. - Any Mp3s purchased while subscribed remain in your account even if you discontinue your subscription. USD $9.99 per month or USD $99.99 per year (a $20 savings). 7 Day free trial on all subscriptions. *Payment will be charged to your iTunes account at confirmation of purchase. *Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. *Your account will be charged for the renewal within 24-hours prior to the end of the current period. *Subscriptions may be managed and auto-renewal may be turned off by going to Account Settings after purchase. *If within the 7 day free trial period you cancel for any reason you will not be charged. If you continue, your paid subscription begins at the end of your free trial. To view Privacy Policy go to: https://www.pianotrax.com/privacy-policy To see Terms and Conditions go to: https://www.pianotrax.com/terms-and-conditions

Screenshots

iScrudenizer1 screens
PianoTrax4 screens

Verdict

The call

The clearest difference is review sentiment: PianoTrax at 98% against iScrudenizer's 0%. PianoTrax also leads on rating (4.7 vs 1.6) and update cadence (every 3 months vs every 70 months). iScrudenizer's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.0). On price, ads 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

Both are free to download. PianoTrax sells 4 in-app purchases, starting at $9.99 per month. iScrudenizer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PianoTrax holds the better App Store score, 4.7 against 1.6. That said, the two scores are not equally well evidenced: PianoTrax has 179 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of iScrudenizer's written reviews are positive against 98% of PianoTrax's.

UpkeepUpdate frequency

iScrudenizer ships an update every 70 months, PianoTrax every 3 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

Scorecard7 real differences · 3 level
iScrudenizer versus PianoTrax: the parameters behind the verdict, then further details
ParameteriScrudenizerPianoTrax
PriceFreeFree
Rating1.6 (5 ratings)4.7 (179 ratings) — better
Positive reviews0.0% of reviews97.6% of reviews — better
Number of ratings5179 — better
Update frequencyEvery 70 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size1 MB12 MB
Age rating4+9+
DeveloperRemmy Demmy ProductionsPianoTrax

Customer experience

iScrudenizer

All ratings5 ratings
Positive0.0%
Neutral20.0%
Negative80.0%
Written reviews4 reviews
Positive0.0%
Neutral25.0%
Negative75.0%

PianoTrax

All ratings178 ratings
Positive93.3%
Neutral1.7%
Negative5.1%
Written reviews125 reviews
Positive97.6%
Neutral0.8%
Negative1.6%

Bugs and requests

iScrudenizer

Not enough reviews yet to summarise bugs or requests.

PianoTrax

Reported bugs

2 issues
  • Search function crashes the app
  • Incompatibility issues with some devices

Requested features

3 requests
  • Download tracks with adjusted tempo and key
  • Integrate with other music apps
  • Add more song genres beyond musical theatre

In-app purchases

None

iScrudenizer

No in-app purchases

4 purchases

PianoTrax

Subscriptions2
  • PianoTrax One Month Unlimited7 Days trial$9.991 Month
  • PianoTrax one Year Unlimited7 Days trial$99.991 Year
One-time2
  • Pianotrax Partial Track$3.99
  • PianoTrax Full Track$5.99

Questions

Is iScrudenizer free?
iScrudenizer is free to download, with no in-app purchases.
Is PianoTrax free?
PianoTrax is free to download, with in-app purchases available.
Which has better reviews, iScrudenizer or PianoTrax?
PianoTrax is rated higher. iScrudenizer averages 1.6 out of 5 from 5 ratings, while PianoTrax averages 4.7 from 179 ratings.
Do iScrudenizer or PianoTrax have ads?
Neither iScrudenizer nor PianoTrax shows ads.
Which is updated more often, iScrudenizer or PianoTrax?
iScrudenizer ships an update every 70 months, and PianoTrax every 3 months. Most recently, iScrudenizer was updated on November 1, 2026 and PianoTrax on November 2, 2026.

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