iDensity vs e
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.
e
Create retro-style music with a sampling keyboard featuring tempo-based looping. Record, manipulate, and play back samples with various effects and flexible playback modes. Integrate with other audio apps and control parameters via MIDI.
- Retro sampling keyboard
- Tempo-based looping
- Reverb, bit crusher, resonant filter
- Multiple loop and start/stop modes
- MIDI control and Core MIDI support
- AUv3, Audiobus, Inter App Audio integration
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Elsa is a retro style sampling keyboard with tempo based looping. Record, save, load, reverse samples with a multi octave on screen keyboard or plug in your core midi device of choice, soft- or hardware. Elsa comes with three built in effects, a reverb, a resonant filter and a sample rate/bit crusher. Samples are looped in three different modes, one off, forward and/or forward-reverse. The start and end of playback also comes in three modes, one set of start and stop for all, one set per note and/or one set per octave, allowing for many different types of samples. Additionally at playback time, sample length can also be controlled by a set of sample dividers, 1-8. Elsa supports connections with AudioCopy, AudioBus, Inter App Audio and AUv3. Plus all audio parameters can be modulated by MIDI. +++ Sample keyboard +++ Tempo based looping +++ ADSR +++ Bit/sample crush +++ Reverb +++ Resonant filter: low, band or high pass +++ Record, trim, normalise, reverse, zoom +++ Chromatic and scale keyboard +++ 3 loop modes (one off, forward, forward-reverse) +++ 3 start/stop modes (one for all, one per note, one per octave) +++ Playback length dividers (1,2,3,4,5,6,7,8) +++ Arpeggiator +++ Presets: save/load settings +++ Audio connections: AUv3, Audiobus, Inter App Audio +++ Midi: Core Midi, Bluetooth Midi, AUv3 Midi +++ Ableton Link
Screenshots
Verdict
The clearest difference is price: e at $5.99 against iDensity's $9.99. e also leads on iOS requirement (11.0 vs 17.0). On rating, review sentiment, ratings volume and update cadence 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 e $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for iDensity against 4.9 for e. Both are backed by a comparable volume of ratings — 48 and 31 respectively. Written reviews split almost evenly too, at 87% and 87% positive.
iDensity ships an update monthly, e every 3 weeks. Both last shipped on November 13, 2026.
| Parameter | iDensity | e |
|---|---|---|
| Price | $9.99 | $5.99 — better |
| Rating | 4.9 (48 ratings) — better | 4.9 (31 ratings) |
| Positive reviews | 86.8% of reviews | 87.1% of reviews — better |
| Number of ratings | 48 — better | 31 |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 17 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Erik Sigth |
Customer experience
iDensity
e
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
e
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iDensity
No in-app purchases
e
No in-app purchases








