Comparison

iDensity vs e

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

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.

Highlights
  • 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
Features
Read full description

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

iDensity4 screens
e4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

iDensity costs $9.99 and e $5.99 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 — 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.

UpkeepUpdate frequency

iDensity ships an update monthly, e every 3 weeks. Both last shipped on November 13, 2026.

Scorecard2 real differences · 8 level
iDensity versus e: the parameters behind the verdict, then further details
ParameteriDensitye
Price$9.99$5.99 — better
Rating4.9 (48 ratings) — better4.9 (31 ratings)
Positive reviews86.8% of reviews87.1% of reviews — better
Number of ratings48 — better31
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.011.0 — better
Further details — not scored
Size17 MB43 MB
Age rating4+4+
DeveloperapeSoftErik Sigth

Customer experience

iDensity

All ratings48 ratings
Positive97.9%
Neutral0.0%
Negative2.1%
Written reviews91 reviews
Positive86.8%
Neutral2.2%
Negative11.0%

e

All ratings31 ratings
Positive96.8%
Neutral0.0%
Negative3.2%
Written reviews31 reviews
Positive87.1%
Neutral12.9%
Negative0.0%

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

e

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

iDensity

No in-app purchases

None

e

No in-app purchases

Questions

Is iDensity free?
iDensity costs $9.99, with no in-app purchases.
Is e free?
e costs $5.99, with no in-app purchases.
Which has better reviews, iDensity or e?
iDensity is rated higher. iDensity averages 4.9 out of 5 from 48 ratings, while e averages 4.9 from 31 ratings.
Do iDensity or e have ads?
Neither iDensity nor e shows ads.
Which is updated more often, iDensity or e?
iDensity ships an update monthly, and e every 3 weeks. Most recently, iDensity was updated on November 13, 2026 and e on November 13, 2026.

Other comparisons