Comparison

iDensity vs rrarrow

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

rrarrow

Create experimental audio effects with extended feedback capabilities. This modular noise machine offers a simplified interface for fast assembly and flexible connectivity, allowing you to control processing parameters with the audio signal itself.

Highlights
  • Modular audio effect processing
  • Extended feedback capabilities
  • 20 audio processing blocks
  • Built-in audio recorder
  • MIDI controller support
  • Audiobus and Inter-App Audio support
  • Background audio playback
Features
Read full description

rrarrow is the experimental noise machine / modular audio effect for the iOS featuring extended feedback capabilities. Key features: - Simplicity. The interface is simplified for faster assembly and more flexible connectivity — you can assemble your effect very fast and control all the processing parameters with the audio signal! - Feedback capabilities. You can add feedbacks to the audio chain to get some chaotic noise sounds . - 20 blocks for audio processing: - Sine generator. Basic oscillator with sine waveform - Saw and square oscillators - Signal multiplier - Delay - Frequency shifter - Envelope follower - “Lorenz attractor” - Quantizer - Sample-and-hold - Reverb - Special Lowpass filter - Clipper - Nonlinear shaper (for self-oscillating circuit) - two special waveshaping modules with “fold” and “wrap” distortion blocks that work with audiofiles: - lookup table. Loads up to 10 seconds of audiofile to be used as nonlinear transfer function - Players with/without interpolation and speed control - "scrub" block for semi-random granular file playback - Built-in audio recorder. Share the audio file to other applications or AudioShare. - MIDI support! Assign MIDI controllers to all faders. Supports network midi and has a virtual MIDI in. - Audiobus support. Now you can stream live audio directly to other Audiobus-compatible apps! See http://audiob.us for more information. Works as input and filter. - Audiobus state saving support - Inter-App Audio support - Background audio support: enabled when connected to Audiobus and user switchable otherwise. The 'background audio" switch is located in app's "settings" page iPad2/iPhone4S or newer is recommended for complex presets this app is optimized for iPad and iPhone 5 To get started please watch the tutorial videos on the website and read the user guide inside the app

Screenshots

iDensity4 screens
rrarrow3 screens

Verdict

The call

The clearest difference is price: rrarrow at $3.99 against iDensity's $9.99. iDensity's advantage is rating (4.9 vs 4.6). 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 rrarrow $3.99 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 19 respectively. Written reviews point the same way: 86% of iDensity's written reviews are positive against 81% of rrarrow's.

UpkeepUpdate frequency

iDensity ships an update monthly, rrarrow every 4 weeks. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 8 level
iDensity versus rrarrow: the parameters behind the verdict, then further details
ParameteriDensityrrarrow
Price$9.99$3.99 — better
Rating4.9 (48 ratings) — better4.6 (19 ratings)
Positive reviews85.7% of reviews — better81.3% of reviews
Number of ratings48 — better19
Update frequencyMonthlyEvery 4 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.615.6
Further details — not scored
Size16 MB29 MB
Age rating4+4+
DeveloperapeSoftAlexey Nadzharov

Customer experience

iDensity

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

rrarrow

All ratings19 ratings
Positive94.7%
Neutral0.0%
Negative5.3%
Written reviews16 reviews
Positive81.3%
Neutral6.3%
Negative12.5%

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

rrarrow

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

iDensity

No in-app purchases

None

rrarrow

No in-app purchases

Questions

Is iDensity free?
iDensity costs $9.99, with no in-app purchases.
Is rrarrow free?
rrarrow costs $3.99, with no in-app purchases.
Which has better reviews, iDensity or rrarrow?
iDensity is rated higher. iDensity averages 4.9 out of 5 from 48 ratings, while rrarrow averages 4.6 from 19 ratings.
Do iDensity or rrarrow have ads?
Neither iDensity nor rrarrow shows ads.
Which is updated more often, iDensity or rrarrow?
iDensity ships an update monthly, and rrarrow every 4 weeks. Most recently, iDensity was updated on September 21, 2026 and rrarrow on September 24, 2026.

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