Comparison

iDensity vs SynthScaper

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

Head to head
About

iDensity

This app offers real-time asynchronous sound file granulation, enabling users to create a wide array of audio effects. It provides tools for time/pitch manipulation, texture generation, buffer recording, and complex sound exploration. Designed for musicians and sound designers, it offers flexibility for live performance, studio composition, and on-the-go sound design.

Highlights
  • Real-time sound granulation
  • Time/pitch shifting and jittering
  • Texture generation
  • Buffer recording and manipulation
  • Scrub pad exploration
  • Dynamic envelope shaping
  • Audio Unit (AUv3) support
Features
Read full description

iDensity is rated as a Killer App by Apps4iDevices. iDensity is a new real-time software designed for asynchronous sound file granulation, a genuine granular playground able to generate a wide range of usual and not so usual effects: time/pitch shifting, time/pitch jittering, intricate textures, grain fountain/pulverizer, recording and manipulation of buffers, complex scrub pad exploration, dynamic envelope shape and many more. iDensity for iPad will give you all the basic and advanced tools you need to manipulate sound in subtle and surprising ways. All these features are packed in an optimized, user-friendly, visually sharp interface that is easy to access when fast-improvising live, composing in a studio, or sound designing at home and on the go! You will have the power, freedom, and flexibility to create like never before – on your iPad! Control and shape grains, anytime, anywhere with Density for iPad. + Six Granular Streams + Six Remote Audio Units Host support + Full Instr and FX AudioUnit (AUv3) support + High Density Granulation + Sampled and Live granulation + In-Stream Echo and RM post Fx + Multichannels Audiobus Inter-App Audio support + MIDI, Virtual Midi and Network + Sharing common audio files via iTunes, Dropbox AudioCopy etc... + Snapshots Presets Morphing Pad + Post Fx chain: Parametric and High Shelf Filters, Classic Reverb and Dynamics Processor + Scrub Recording and playback + etc.

About

SynthScaper

Create unique ambient soundscapes with a powerful synthesizer. Experiment with multi-layered oscillators, filters, and effects to generate everything from melodic instruments to abstract noises. Features a neural network for generating new presets and extensive MIDI/screen keyboard control.

Highlights
  • Multi-layered oscillators
  • Chains of filters and effects
  • Envelope generators and LFOs
  • Designer tool for preset generation
  • Flexible screen and MIDI keyboard control
  • Inter-App Audio and Audiobus 3 support
Features
Read full description

Synthesizer specially designed for creating and experiments with ambient soundscapes in wide range from noises to melodic instruments and everything in between. The sound engine of SynthScaper has its own unique sounding differ from any other software synths. You can construct outstanding melodic pads or atonal soundscapes from different kind of built-in or downloaded samples by using all power of multi-layered oscillators, chains of filters and effects, envelope generators and low frequency oscillators. Or you can create your own sound scenes combining oscillators presets from build-in library. Or just use predefined scenes. Very flexible settings of each module give you a great opportunity for creating unique and colorful sounding from usual instruments or natural samples and adding automated changes and spatial effects for an endless variations. Different ways of assigning screen and MIDI keyboards to the oscillators provide very advanced features to control the sound. The on-screen keyboard is adapted to create special effects and varying the continuous textures and drones. The Designer tool uses the neural network to generates new presets based on already existing by adding some random variations and checking the result so that the new preset remains similar to the selected pattern. Key features: - Three independent oscillators. - Three layers for each oscillator. - Six voices for each layer. - Six envelope generators. - Six low frequency oscillators. - Arpeggiator / sequencer for each oscillator. - Designer tool for generate scenes and presets. - General processing of level, balance, LPF, HPF for each layer. - Three slots for filters and effects after each oscillator. - Twenty additional selectable filters and effects. - Spatial mixer with two different sound space. - Screen keyboard adapted for continuous textures and soundscapes. - Predefined set of keyboard scales and custom scales. - Full screen, double and split features for screen keyboard. - Options of screen keyboard for pitch, continuous, modify, velocity. - Supports for two virtual and two MIDI keyboards at the same time. - Flexible assigning keyboards and controls to the oscillators. - Two main effects controls can combine several parameters. - Uploading samples thru Dropbox, Web access, clipboard. - Auto and manual tuning of samples with frequency analyzer. - Set of predefined and ready-to-use scenes and presets. - Built-in library of samples of instruments, synths, noises, etc. - Possibility to pack and share scenes and samples as single file. - Supports loop points and note info in WAV files. - Detailed application description (built-in and PDF file). - Inter-App audio compatible (with transport and BPM controls). - Supports Audiobus 3 with "State Saving" and MIDI features. - Supports Ableton Link with start / stop sync. Requirements: Recommended at least iPhone 6 / iPad Mini 4 / iPad Air 2 and higher. You can find more details about SynthScaper on the website: http://motion-soundscape.blogspot.com Overview and demo video: Preview - http://youtu.be/qqeWdFVfBCg Preview - http://youtu.be/vyKX0ZfJ_n8 Sound design demo - http://youtu.be/oqCz7ALNhOM Presets demo - http://youtu.be/-pflmiFtHnc Presets demo - http://youtu.be/InWOcfHS6rA

Screenshots

iDensity4 screens
SynthScaper4 screens

Verdict

The call

The clearest difference is price: iDensity at $9.99 against SynthScaper's $14.99. iDensity also leads on rating (4.9 vs 4.6). SynthScaper's advantage is iOS requirement (10.0 vs 17.0). On review sentiment, ratings volume, 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

iDensity costs $9.99 and SynthScaper $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

iDensity holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 48 and 72 respectively. Written reviews split almost evenly too, at 86% and 87% positive.

UpkeepUpdate frequency

iDensity ships an update monthly, SynthScaper every 2 months. The most recent releases landed on October 21, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
iDensity versus SynthScaper: the parameters behind the verdict, then further details
ParameteriDensitySynthScaper
Price$9.99 — better$14.99
Rating4.9 (48 ratings) — better4.6 (72 ratings)
Positive reviews86.1% of reviews86.8% of reviews — better
Number of ratings4872 — better
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.010.0 — better
Further details — not scored
Size17 MB68 MB
Age rating4+4+
DeveloperapeSoftIgor Vasiliev

Customer experience

iDensity

All ratings48 ratings
Positive97.9%
Neutral0.0%
Negative2.1%
Written reviews79 reviews
Positive86.1%
Neutral2.5%
Negative11.4%

SynthScaper

All ratings71 ratings
Positive91.5%
Neutral2.8%
Negative5.6%
Written reviews68 reviews
Positive86.8%
Neutral4.4%
Negative8.8%

User reviews

iDensity

From 48 App Store ratings

What we love

  • ✨ Incredible soundscapes
  • 🎛️ Powerful granular synthesis
  • 🎚️ Multi-channel capability (6 channels)
  • 🎧 Excellent for ambient music
  • 💡 Innovative sound design tool

Room to improve

  • 🤔 Steep learning curve
  • 🎨 Unappealing UI/color schemes (for some)
  • 🎛️ Counterintuitive controls (for some)
  • 💰 In-app purchases can be costly
  • ❓ Lack of clear documentation/tutorials (historically)

SynthScaper

From 72 App Store ratings

What we love

  • ✨ Amazing soundscapes
  • 💡 Endless creative possibilities
  • 🎨 Deep and complex sound design
  • 🎶 Inspiring randomizer function
  • 🚀 Powerful and versatile synth

Room to improve

  • 🤯 Steep learning curve
  • 🐌 Laggy response
  • 🔋 Battery hog
  • 😵 Obscure and archaic interface
  • ❓ Unclear UI elements

Bugs and requests

iDensity

Reported bugs

10 issues
  • Occasional crashes (historically)
  • AudioBus issues (historically)
  • Preset management not working correctly (historically)
  • Transport sync not working (historically)
  • GUI bugs (e.g., maximizing a strand)
Show 5 more
  • Craquements, grésillements (cracking, crackling)
  • X/Y snapshot morphing not working on iPad 1
  • Sample import issues (cut off)
  • Unable to record from microphone (historically)
  • App crashes upon recording (historically)

Requested features

10 requests
  • Independent MIDI note control over pitch for each stream
  • Alphabetical preset sorting
  • Load existing project name into 'Save As'
  • Multi-port output for AUM/Ape Matrix
  • Built-in wave-editor for sample cutting
Show 5 more
  • Ability to determine loop length
  • Motion sequencer or assignable LFOs
  • Sync AU3 transport to host (historically)
  • Add MIDI note and channel select as modifier/controller
  • Dark mode option

SynthScaper

Reported bugs

5 issues
  • Crashing issue (resolved)
  • Laggy response to key touch
  • App doesn't stop in background
  • Clipping and digital distortion on iPad Pro
  • Modal dialogue boxes require multiple dives

Requested features

14 requests
  • AUv3 compatibility
  • Audio Unit support
  • Update or new version
  • MPE keyboard support
  • Export files to lite version
Show 9 more
  • UI color palette customization
  • Loop start/end point management
  • Pitch modulation (added in update)
  • More lighter sounds/textures
  • Ableton Link support
  • Extendable keyboard for performance
  • Spatial controller under voltage control
  • Recorder for manual movement
  • Easier interface

In-app purchases

None

iDensity

No in-app purchases

None

SynthScaper

No in-app purchases

Questions

Is iDensity free?
iDensity costs $9.99, with no in-app purchases.
Is SynthScaper free?
SynthScaper costs $14.99, with no in-app purchases.
Which has better reviews, iDensity or SynthScaper?
iDensity is rated higher. iDensity averages 4.9 out of 5 from 48 ratings, while SynthScaper averages 4.6 from 72 ratings.
Do iDensity or SynthScaper have ads?
Neither iDensity nor SynthScaper shows ads.
Which is updated more often, iDensity or SynthScaper?
iDensity ships an update monthly, and SynthScaper every 2 months. Most recently, iDensity was updated on October 21, 2026 and SynthScaper on October 26, 2026.

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