iDensity vs strng
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.
strng
This app generates plucked string sounds using a physical modeling synthesis engine. It offers polyphonic voices, a built-in keyboard, and MIDI control. Shape your sound with delay and resonant filters, and integrate with other music apps.
- Physical modeling string synthesis
- 16 voice polyphony
- Built-in 25-key keyboard with aftertouch
- MIDI controller support (USB/Wi-Fi)
- Stereo ping-pong delay
- Two-channel resonant filter with LFOs
- Audiobus, IAA, and AUv3 support
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Strng is a string synthesiser inspired by the karplus-strong algorithm. The physical modelling starts with a short burst of noise that then guided by a tuned delay buffer and string tension filter, generates plucked string like sounds. No samples are used. Strng is 16 voice polyphonic and can be controlled with an in app 25 key chromatic keyboard or connect prefered midi controller through USB or Wifi. To further shape the sound two post effects are available, a ping-pong stereo delay and two channel resonant filter controlled by two LFOs. Connect to other apps through AudioBus, inter app audio or load in DAWs as AUv3. +++ String synthesis engine +++ 16 voice polyphonic +++ Audiobus, IAA and AUv3 +++ Core MIDI, bluetooth midi and limited MPE +++ 25 multitouch keyboard with aftertouch control +++ Factory presets, save and load your own settings, drag'n drop from files app +++ Aftertouch modulation for attack, sustain, bit crush, resonant filter and detune lfo +++ Stereo ping-pong delay +++ Two channel resonant low pass filter LFOs
Screenshots
Verdict
The clearest difference is price: strng at $4.99 against iDensity's $9.99. strng also leads on iOS requirement (9.0 vs 15.6). iDensity's advantage is update cadence (monthly vs every 4 months) and rating (4.9 vs 4.7). 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 strng $4.99 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 4.7. Both are backed by a comparable volume of ratings — 48 and 35 respectively. Written reviews point the same way: 86% of iDensity's written reviews are positive against 84% of strng's.
iDensity ships an update monthly, strng every 4 months. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.
| Parameter | iDensity | strng |
|---|---|---|
| Price | $9.99 | $4.99 — better |
| Rating | 4.9 (48 ratings) — better | 4.7 (35 ratings) |
| Positive reviews | 85.7% of reviews — better | 84.4% of reviews |
| Number of ratings | 48 — better | 35 |
| Update frequency | Monthly — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | apeSoft | Erik Sigth |
Customer experience
iDensity
strng
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
strng
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iDensity
No in-app purchases
strng
No in-app purchases









