iDensity vs Impaktor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- 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
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* "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
Verdict
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
iDensity costs $9.99 and Impaktor $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
iDensity ships an update monthly, Impaktor every 12 months. Both last shipped on September 21, 2026.
| Parameter | iDensity | Impaktor |
|---|---|---|
| Price | $9.99 | $6.99 — better |
| Rating | 4.9 (48 ratings) — better | 3.7 (53 ratings) |
| Positive reviews | 85.7% of reviews — better | 78.8% of reviews |
| Number of ratings | 48 | 53 — better |
| Update frequency | Monthly — better | Every 12 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.6 |
| Further details — not scored | ||
| Size | 16 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | BeepStreet |
Customer experience
iDensity
Impaktor
User reviews
iDensity
From 48 App Store ratingsWhat 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 ratingsWhat 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)
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- 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
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- 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
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- Landscape mode for iPad
In-app purchases
iDensity
No in-app purchases
Impaktor
No in-app purchases









