Comparison

ScaleGen vs Stone Echo

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

Head to head
About

ScaleGen

Generate and edit musical scales with intricate detail. Explore traditional and experimental tunings, audition your creations, and export them as MIDI files or to other applications. Ideal for composers and students seeking to expand their musical horizons.

Highlights
  • Generate and manipulate musical scales
  • Detailed scale definition and editing
  • Audition scales within the app
  • Export as MIDI or to Gestrument
  • Predefined scales from various traditions
  • Explore microtonal and experimental tunings
Read full description

ScaleGen - the ultimate scale generator and editor! Generate and manipulate musical scales in any way you can imagine. You think you know what a scale is - think again. In ScaleGen you can do all that you would traditionally imagine when it comes to scales and pitch organisation, and then much, much more. Define or change scales in the most detailed and intricate way. Audition the scales you make from within the app or export it as a MIDI file or to our app Gestrument - the revolutionary gesture-instrument. This is the tool for anyone who wants to go beyond the traditional tonalities in whichever genre. ScaleGen comes with predefined scales of all kinds - from the traditional western scales and early music (Baroque/Renaissance) scales to asian scales from India, Indonesia and elsewhere as well as more conceptual scales based in the classical contemporary music. This is the ultimate tool for experimental composers in any genre as well as for musicians who want to explore new ways of thinking about music. The educational aspects of how pitches can be organised makes ScaleGen a must have for serious music students. But the directness of the app makes the learning both fun and artistically developing. What is a scale? For most people it is a collection of pitches within one octave, with equal temperament (all half tone steps equally long) or with microtonal intonation. That kind of scales are of course possible to make and edit in ScaleGen which gives you a keyboard with complete control of up to 24 pitches within one octave. But the most interesting things with ScaleGen is when you start to think of a scale as something more open. Consider these questions: What if your scale was different in every octave? Why must a scale always go from down to up? What if you could use a variation of the overtone series as a scale? How does it sound if you divide the octave in five steps instead of twelve? In ScaleGen we define a scale as any list of MIDI pitches that you can manipulate in many ways. You can start with a keyboard to input pitches, you can use the concept of the overtone series with multiplication of frequencies, you can define the number and size of the steps in the scale or you can import MIDI files and use them as scales. Then you can fine-tune your scale in a matrix with a number of tools. You can then try and play your scale directly in the app, using built-in sounds or control your favorite external synthesizer/app through MIDI. If you want to try and play on your newly created scales in another way we recommend you open them in the app Gestrument - the revolutionary gesture-instrument. But you can also save the scales as text, Scala, or MIDI files and open them in another program.

About

Stone Echo

This app creates a unique echo effect with adjustable frequency modulation, inspired by Mayan pyramid acoustics. It offers musical and experimental soundscapes, functioning as a standalone application or an AUV3 plugin.

Highlights
  • Frequency changing echo effect
  • Phase modulated frequency
  • Standalone app and AUV3 plugin
  • Adjustable time, feedback, and level
  • UFO mode for experimental sounds
Features
Read full description

Echo effect Audio Unit V3 inspired by the mayan pyramids acoustic echo. I come up with a complex phase modulated frequency of the echo so you can change it’s frequency signature. It is kind of changing the material of the reflective surface and I called it “Stone F”. I have made the echo to sound more music friendly to me but there is button called “UFO” and if you press it the effect is more close to the mayan just shifting the frequency backwards (I liked that better). You can also control the feedback of the phase modulation. The effect can work as a stand alone app and as an audio unit AUV3 plug-in. Stone Echo is an effect that is heavy on the CPU Controls: - Time - time offset of the echo - Stone F - frequency response of the echo - Feedback - echo feedback - Level - the volume of the echo - UFO - heavy modulated echo

Screenshots

Stone Echo2 screens

Verdict

The call

The clearest difference is rating: ScaleGen at 4.7 against Stone Echo's 2.8. ScaleGen also leads on review sentiment (71% vs 50%) and ratings volume (12 vs 4). Stone Echo's advantage is device support (3 vs 1) and price ($2.99 vs $3.99). On update cadence, ads, in-app purchases and monetization model 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

ScaleGen costs $3.99 and Stone Echo $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ScaleGen holds the better App Store score, 4.7 against 2.8. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews point the same way: 71% of ScaleGen's written reviews are positive against 50% of Stone Echo's.

UpkeepUpdate frequency

ScaleGen ships an update every 29 months, Stone Echo every 38 months. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
ScaleGen versus Stone Echo: the parameters behind the verdict, then further details
ParameterScaleGenStone Echo
Price$3.99$2.99 — better
Rating4.7 (12 ratings) — better2.8 (4 ratings)
Positive reviews70.6% of reviews — better50.0% of reviews
Number of ratings12 — better4
Update frequencyEvery 29 months — betterEvery 38 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS10.010.0
Further details — not scored
Size14 MB9 MB
Age rating4+4+
DeveloperGestrument ABAleksandar Mlazev

Customer experience

ScaleGen

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews17 reviews
Positive70.6%
Neutral17.6%
Negative11.8%

Stone Echo

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

ScaleGen

No in-app purchases

None

Stone Echo

No in-app purchases

Questions

Is ScaleGen free?
ScaleGen costs $3.99, with no in-app purchases.
Is Stone Echo free?
Stone Echo costs $2.99, with no in-app purchases.
Which has better reviews, ScaleGen or Stone Echo?
ScaleGen is rated higher. ScaleGen averages 4.7 out of 5 from 12 ratings, while Stone Echo averages 2.8 from 4 ratings.
Do ScaleGen or Stone Echo have ads?
Neither ScaleGen nor Stone Echo shows ads.
Which is updated more often, ScaleGen or Stone Echo?
ScaleGen ships an update every 29 months, and Stone Echo every 38 months. Most recently, ScaleGen was updated on October 13, 2026 and Stone Echo on October 7, 2026.

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