Comparison

Kaleidoscope Echo vs Testere Supersaw Synth AUv3

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

Head to head
About

Kaleidoscope Echo

This app processes MIDI messages to create delayed and manipulated note sequences, simulating audio delay effects with added musical control. It allows for pitch and velocity manipulation of repeats, scale-based harmonization, and real-time harmony generation.

Highlights
  • MIDI note delay simulation
  • Pitch and velocity manipulation per repeat
  • Scale-based pitch harmonization
  • Real-time harmony generation
  • Customizable note sequences
  • Preset manager
Features
Read full description

Kaleidoscope is a MIDI processor designed specifically to simulate audio delay lines, but instead of processing audio data, it generates a series of delayed MIDI messages to achieve the same thing sonically, but with some added advantages. You can have Kaleidoscope emulate multi-tap delays and gating effects, as well as being able to manipulate the pitch and velocity of each repeat, something that is not normally done using a typical audio echo or delay effect. By default, all repeated notes are processed using the chromatic scale mode, but you are free to impose any key and scale to ensure any pitched notes are incremented or decremented in accordance with the chosen scale. Any MIDI notes that are presented to the Input MIDI port are processed by Kaleidoscope, and the modified output is then passed on to other instrument plugins. You can chain multiple instances of Kaleidoscope to create even more complex harmonies. For example, the first instance could turn one note into a simple 3-note chord, and the second instance could add octave offsets to create a lush, multi-octave outputs – all from a single note! It is also possible to perform simple, real-time harmonies using Kaleidoscope by setting the number of repeats to zero. In this mode, you can customize the pitch and velocity settings and add up to 17 additional harmonies. You can also switch to user definable mode to specify per step velocity and pitch settings to create complex sequences, complete with ties, note skip and loop mode. Features: ○ Ability to set a velocity increment or decrement per repeat. ○ Increment or decrement the pitch by a specified number of semitones per repeat. ○ Increment or decrement the pitch by a specified number of scale degrees per repeat. ○ Disable specific repeats to create syncopated rhythms or simulate a tapped delay. ○ You can turn disabled notes into ties. ○ Apply key and scale to the generated notes (126 scales supported in every key). ○ You can create your own custom scales. ○ User mode allows complete control over pitch and velocity per step. ○ Use Kaleidoscope to create instant real-time harmonies. ○ Create your own custom pitch and velocity sequences. ○ Preset Manager to create, load, save, and rename presets. ○ Drag and Drop backups and exports.

About

Testere Supersaw Synth AUv3

This powerful synthesizer offers 7-oscillator supersaw voices with unique curve-based controls for detune, phase, and panning. Create everything from tight analog stacks to wide, animated textures with its flexible wavetable oscillators and built-in effects.

Highlights
  • 7-saw stacked oscillators per voice
  • Curve-based detune, phase, flavor, pan spread
  • Sine sub oscillator
  • Global LFO
  • Analog-style ladder filter
  • ADSR amp envelope
  • Built-in arpeggiator
  • Stereo ping-pong delay
Features
Currently charting
Read full description

TESTERE is a 7-oscillator supersaw synth where each voice stacks 7 saws with per-voice control over detune, phase, waveshape (flavor), stereo pan, and a sine wave sub oscillator. Instead of micromanaging each oscillator manually, TESTERE uses distribution curves to control these offsets. You dial in a curve shape and a spread amount, and the synth applies the resulting values across all oscillators smoothly interpolated, musically controllable, and repeatable. This system allows for infinite combinations, from tight analog-like stacks to wide, animated swarms, all with a minimal set of parameters. Each oscillator is a wavetable oscillator with a selection of saw waveforms. You can subtly vary the shape across oscillators or push it further for complex harmonic shifts. All detune, phase, flavor, and panning spreads are curve-driven and musically scaled, making the synth flexible but not overwhelming. A clean sine sub oscillator is included for adding low-end weight, with an adjustable octave (set in settings) and a level control (in the FX panel). Features: - 7-saw stacked oscillators per voice, 8-voice polyphony - Curve-based detune, phase, flavor, and pan spread - Clean sine sub oscillator with octave and level controls - Single global LFO with assignable target - Analog-style ladder filter with rise/fall envelope - ADSR amp envelope per voice - Built-in arpeggiator - Stereo ping-pong delay - AUv3 plugin support AUv3 Compatible Hosts: Works as a plugin in GarageBand, Logic Pro for iPad, AUM, Loopy Pro, Cubasis, BeatMaker 3, and other AUv3-compatible hosts. Whether you want to dial in tight classic stacks or explore chaotic layered textures, TESTERE’s curve system gives you deep control without micromanagement.

Screenshots

Kaleidoscope Echo4 screens
Testere Supersaw Synth AUv34 screens

Verdict

The call

Kaleidoscope Echo and Testere Supersaw Synth AUv3 both sit at 5.0 stars, but that hides the real split: 100% of Testere Supersaw Synth AUv3's written reviews are positive against 50% of Kaleidoscope Echo's. Testere Supersaw Synth AUv3 also leads on update cadence (every 4 days vs every 3 months) and price ($7.99 vs $12.99). On rating, ratings volume, ads and in-app purchases 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

Kaleidoscope Echo costs $12.99 and Testere Supersaw Synth AUv3 $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Kaleidoscope Echo against 5.0 for Testere Supersaw Synth AUv3. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 50% of Kaleidoscope Echo's written reviews are positive against 100% of Testere Supersaw Synth AUv3's.

UpkeepUpdate frequency

Kaleidoscope Echo ships an update every 3 months, Testere Supersaw Synth AUv3 every 4 days. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 7 level
Kaleidoscope Echo versus Testere Supersaw Synth AUv3: the parameters behind the verdict, then further details
ParameterKaleidoscope EchoTestere Supersaw Synth AUv3
Price$12.99$7.99 — better
Rating5.0 (2 ratings)5.0 (1 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings2 — better1
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#192 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size21 MB15 MB
Age rating4+4+
Developer4Pockets.comCem Olcay

Customer experience

Kaleidoscope Echo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Testere Supersaw Synth AUv3

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Kaleidoscope Echo

No in-app purchases

None

Testere Supersaw Synth AUv3

No in-app purchases

Questions

Is Kaleidoscope Echo free?
Kaleidoscope Echo costs $12.99, with no in-app purchases.
Is Testere Supersaw Synth AUv3 free?
Testere Supersaw Synth AUv3 costs $7.99, with no in-app purchases.
Which has better reviews, Kaleidoscope Echo or Testere Supersaw Synth AUv3?
Kaleidoscope Echo and Testere Supersaw Synth AUv3 are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.
Do Kaleidoscope Echo or Testere Supersaw Synth AUv3 have ads?
Neither Kaleidoscope Echo nor Testere Supersaw Synth AUv3 shows ads.
Which is updated more often, Kaleidoscope Echo or Testere Supersaw Synth AUv3?
Kaleidoscope Echo ships an update every 3 months, and Testere Supersaw Synth AUv3 every 4 days. Most recently, Kaleidoscope Echo was updated on September 16, 2026 and Testere Supersaw Synth AUv3 on September 21, 2026.

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