Comparison

iDensity vs Vibro Acoustics

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

Vibro Acoustics

Features
Read full description

The VibroAcoustics app is the companion of the ViBoard - a curated library of soundscapes created to work through both listening and physical sensing. Our music is created specifically for vibroacoustic playback. Deep subsonic bass, natural soundscapes, organic instruments and contemporary sound design combine to create immersive experiences that are felt with the entire body. Every track includes carefully composed therapeutic vibrations, made specifically for the ViBoard's tactile frequency response. SOUND & VIBRATION THERAPY FOR NERVOUS SYSTEM REGULATION Compositions incorporate slow rhythms, therapeutic low frequencies, nature field-recordings and instruments such as singing bowls, gongs, flutes and harmonic sounds. The result is music which creates space for relaxation, recovery, body awareness and nervous system regulation. DESIGNED FOR YOUR STATE Find music according to what your system needs - whether you're winding down, meditating, recovering or activating. • Relaxation - soft, slow compositions for calming and unwinding • Activation - pulsating journeys for energy and presence • Sleep - gentle soundscapes for bedtime and deep rest • Sound Massage - deeper tactile experiences for bodywork and therapy • Breathwork - structured sound journeys supporting conscious breathing • Guided Meditation - music combined with spoken guidance • Children's Journeys - imaginative and safe sound worlds with spoken word • Exploration - artistic compositions for sonic sensory adventures CHOOSE YOUR INTENSITY The Bassmeter shows how strongly the music is designed to be felt through the body. 1 - Gentle Breeze 2 - Flow 3 - Core Base 4 - Deep Grounding 5 - Full Immersion Start gently and explore different levels according to your body and the experience you want. CHOOSE YOUR TIME Sessions are available in 15, 30, 45, 60 and 90-minute formats, making it easy to find an experience that fits your moment. Short sessions can provide a quick reset. Longer sessions allow you to settle deeper into the experience. MAKE IT YOURS • Build playlists and save your favourite tracks • Explore different categories and intensity levels • Follow the artists and creators behind the music • Continue sessions where you left off • Discover new sound journeys for different moments and needs OFFLINE, ALWAYS AVAILABLE Download your favourite tracks and listen without an internet connection - whether you're in a studio, bedroom, retreat space or somewhere completely offline. THE FULL EXPERIENCE The app can be enjoyed through headphones or speakers, but the ViBoard is where the music becomes physical. Lie down on the board and experience sound simultaneously through your ears and your body. Low-frequency vibration travels through the surface beneath you, creating a tactile dimension that ordinary speakers cannot provide. SCIENCE BEHIND Our research shows significant increase of HRV, decrease of heart rate and enhanced autonomic nervous system activity during sessions. FOR DEEP IMMERSION Use VibroAcoustics music for meditation, sleep, relaxation, breathwork, yoga, bodywork, focused work, creative exploration and recovery - at home or through professional sessions. Experience it independently, with a trained facilitator, or at one of our partner locations.

Screenshots

iDensity4 screens
Vibro Acoustics4 screens

Verdict

The call

The clearest difference is price: Vibro Acoustics at Free against iDensity's $9.99. Vibro Acoustics also leads on update cadence (weekly vs monthly). On ads, in-app purchases, device support and iOS requirement 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

Vibro Acoustics is free to download; iDensity costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

iDensity ships an update monthly, Vibro Acoustics weekly. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

Scorecard2 real differences · 8 level
iDensity versus Vibro Acoustics: the parameters behind the verdict, then further details
ParameteriDensityVibro Acoustics
Price$9.99Free — better
Rating4.9 (48 ratings) — better—
Positive reviews86.1% of reviews—
Number of ratings48 — better—
Update frequencyMonthlyWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size17 MB58 MB
Age rating4+4+
DeveloperapeSoftJonata Ferreira

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

Vibro Acoustics

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

iDensity

No in-app purchases

None

Vibro Acoustics

No in-app purchases

Questions

Is iDensity free?
iDensity costs $9.99, with no in-app purchases.
Is Vibro Acoustics free?
Vibro Acoustics is free to download, with no in-app purchases.
Do iDensity or Vibro Acoustics have ads?
Neither iDensity nor Vibro Acoustics shows ads.
Which is updated more often, iDensity or Vibro Acoustics?
iDensity ships an update monthly, and Vibro Acoustics weekly. Most recently, iDensity was updated on October 14, 2026 and Vibro Acoustics on October 5, 2026.

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