Comparison

iDensity vs Impaktor

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

Impaktor

This app transforms any surface into a playable percussion instrument using your device's microphone. It offers a vast sonic palette with advanced sound modules and synthesis types, allowing for a wide range of acoustic, electronic, and industrial tones. Enjoy a realistic virtual drumming experience with low latency and a 6-track recorder.

Highlights
  • Surface-to-percussion instrument transformation
  • Advanced sound module simulation
  • Semi-modular synthesis architecture
  • Physical modeling, FM, and noise shaping synthesis
  • 6-track audio recorder with 3D panning
  • Ultra-low latency performance
Features
Read full description

* "Without doubt the most powerful and genuinely useful percussion app on the App Store right now" Computer Music * Reached the #1 paid music app in 5 countries * SonicTouch (www.sonicstate.com) gold award Impaktor is a drum synthesizer with a vast sonic palette, that turns any surface into a playable percussion instrument. You just slap your desk like you would a real drum. The real acoustical impulses from the built-in microphone are used as an excitation source for advanced sound modules that simulates behavior of membranes, cymbals, metallophones or strings. This makes Impaktor a highly responsive and expressive instrument. With semi-modular architecture and several types of synthesis, Impaktor can produce a wide range of tones, from acoustic, like Tabla, Djembe, Marimba, Cymbals, Metal bars to electronic or industrial sounds. We strongly recommend using the app with wired headphones to avoid acoustic feedback and ensure ultra-low latency. (USB-C to 3.5 mm Headphone Jack Adapter, USB-C headphones or an audio interface). You can use the Impaktor app with a contact microphone or analog drum pad to achieve isolated and sensitive input, reducing ambient noise and enhancing trigger accuracy. Enjoy the most realistic virtual drumming experience available for mobile devices! SYNTHESIZER - Synthesis: physical modeling, frequency modulation, noise shaping - Semi-modular architecture; 2 modules with configurable routing - 2 modulation sources: velocity and lfo-envelope. Almost every parameter can be modulated - Multimode filter, harmonic exciter and several types of amplifiers - Over 90 presets available, more coming soon - No samples used - Ultra low latency  RECORDER - 6 tracks audio recorder - True 3d panning - Auto-quantization with configurable time-signature - Reverb and Delay effects - Audio-copy and wave export

Screenshots

iDensity4 screens
Impaktor2 screens

Verdict

The call

The clearest difference is rating: iDensity at 4.9 against Impaktor's 3.7. iDensity also leads on update cadence (monthly vs every 12 months). Impaktor's advantage is price ($6.99 vs $9.99). On review sentiment, 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

iDensity costs $9.99 and Impaktor $6.99 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 3.7. Both are backed by a comparable volume of ratings — 48 and 53 respectively. Written reviews point the same way: 86% of iDensity's written reviews are positive against 79% of Impaktor's.

UpkeepUpdate frequency

iDensity ships an update monthly, Impaktor every 12 months. Both last shipped on September 21, 2026.

Scorecard3 real differences · 7 level
iDensity versus Impaktor: the parameters behind the verdict, then further details
ParameteriDensityImpaktor
Price$9.99$6.99 — better
Rating4.9 (48 ratings) — better3.7 (53 ratings)
Positive reviews85.7% of reviews — better78.8% of reviews
Number of ratings4853 — better
Update frequencyMonthly — betterEvery 12 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.6
Further details — not scored
Size16 MB17 MB
Age rating4+4+
DeveloperapeSoftBeepStreet

Customer experience

iDensity

All ratings48 ratings
Positive97.9%
Neutral0.0%
Negative2.1%
Written reviews77 reviews
Positive85.7%
Neutral2.6%
Negative11.7%

Impaktor

All ratings53 ratings
Positive66.0%
Neutral7.5%
Negative26.4%
Written reviews241 reviews
Positive78.8%
Neutral9.5%
Negative11.6%

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)

Impaktor

From 53 App Store ratings

What we love

  • 🚀 Extraordinary app
  • 👍 Responsive and intuitive
  • 👍 Sleek and appealing interface
  • 🎨 Versatile and expressive sounds
  • 🎨 Organic and natural feel

Room to improve

  • 🐛 Crashes with Inter-App Audio
  • 🐛 Issues with WAV exports
  • 🐛 Latency problems on certain devices
  • 🐛 Compatibility issues with iOS updates
  • 🐛 Unreliable saving functionality

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

Impaktor

Reported bugs

5 issues
  • Crashes with Inter-App Audio
  • Issues with WAV exports
  • Latency problems on certain devices
  • Compatibility issues with iOS updates
  • Unreliable saving functionality

Requested features

6 requests
  • MIDI support
  • Audio import functionality
  • Ableton Link sync
  • More quantization options
  • Multitrack export
Show 1 more
  • Landscape mode for iPad

In-app purchases

None

iDensity

No in-app purchases

None

Impaktor

No in-app purchases

Questions

Is iDensity free?
iDensity costs $9.99, with no in-app purchases.
Is Impaktor free?
Impaktor costs $6.99, with no in-app purchases.
Which has better reviews, iDensity or Impaktor?
iDensity is rated higher. iDensity averages 4.9 out of 5 from 48 ratings, while Impaktor averages 3.7 from 53 ratings.
Do iDensity or Impaktor have ads?
Neither iDensity nor Impaktor shows ads.
Which is updated more often, iDensity or Impaktor?
iDensity ships an update monthly, and Impaktor every 12 months. Most recently, iDensity was updated on September 21, 2026 and Impaktor on September 21, 2026.

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