Comparison

AudioLayer vs SWAM Viola

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AudioLayer

This app is a powerful mobile multi-sampler for music production, offering advanced features for creating and manipulating complex instruments. It integrates seamlessly with iOS production environments and supports iCloud for easy collaboration and storage.

Highlights
  • Streaming Sample Engine (SSE)
  • Hierarchical Layer and Zone editing
  • Seamless Instrument Switching (SIS)
  • Integrated audio sample recorder
  • Auto Sampler for hardware synths
  • AUv3 AudioUnit integration
  • iCloud storage and collaboration
Features
Read full description

AudioLayer satisfies the most sought after gap for contemporary music production on iOS devices. AudioLayer is a full featured open standard audio multi-sampler pushing the boundaries beyond what has been available even in the desktop music production worlds. And all this integrated in all relevant iOS production environments especially the emerging AUv3 AudioUnit standard. - SSE - Streaming Sample Engine - The ultra efficient Streaming Sample Engine SSE is capable of playing hundreds of voices of big multi-sampled instruments even in strictly resource limited applications like using multiple instances of AudioLayer in AudioUnit host environments. Innovative features like Sub Sample Looping for perfect loops even in the audible range extend the range of applications even further. - Multiple storage options - The consequent usage of the open file structure of the Files app makes organising even large sample libraries a breeze. Sample recordings and Instrument designs made with AudioLayer are seamlessly available across all your devices and desktop using either iCloud storage or external SSD. The iCloud option opens up new forms of collaborations with musicians all around the world to share your creations and work together. - Multi Scope Editing - To support the creation of complex multi-sampled instruments AudioLayer allows you to use a hierarchical structure of Layers and Zones each with it’s own sound manipulation parameters. A unique element of AudioLayer is the possibility to decide for each Zone at which Scope level your editing apply: For the all Zones in the Instrument, for the Layer only or individually for this Zone only. This opens a whole new world of creative options for sound mangling. For sound manipulation you can use a full set of Filters, Envelopes and LFOs to shape the pitch, timbre and level of the sound of each Zone. SIS - Seamless Instrument Switching The unique architecture of the Streaming Sample Engine allows for instant loading of even complex instruments and makes this switching from one Instrument to the next without cutting off the sound! And this includes of course also different effect settings - Easy Design Workflow - The built in audio sample recorder let you create Instruments on the fly in seconds. The Music Effect AudioUnit / Audiobus effect plugin of AudioLayer let you record multi-samples semi automatically directly inside your preferred host and instantly create an Instrument with the help of several Auto mapping options available. This includes file name based mapping of key ranges and velocities and automatic pitch detection. For the creatives we’ve also integrated a special “Single Cycle Waveform” detector making the use of this special files a breeze. - Auto Sampler feature for easy creation of Sample Instruments from hardware synthesiser. - Versilian Studio Sample Library ( VCSL/VSCO ) with excellent strings and orchestra samples for free download - Exchange libraries with XinematiX App Integration • Stand-alone App • Sample import for EXS24 and SFZ Format • AUv3 AudioUnit Instrument and Music Effect • Inter App Audio • Audiobus 3 Input/Effect with state saving support. • Audio recorder with share function. • Ableton Link compatible.

About

SWAM Viola

This virtual instrument uses physical modeling to generate realistic string performances in real-time, responding dynamically to your playing style. It offers advanced spatial control with a built-in room simulator and can be used standalone or as an AUv3 plugin. Designed for expressive control, it's suitable for various musical styles and accessible to visually impaired users.

Highlights
  • Physical modeling sound generation
  • Real-time dynamic response
  • Built-in Room Simulator (Ambiente)
  • Standalone and AUv3 plugin support
  • Intuitive interface for all users
  • MPE and MIDI controller support
  • Customizable timbre, vibrato, and dynamics
Read full description

SWAM Viola for iOS: Unmatched Realism and Expressive Power in Your Hands Experience the cutting-edge Physical Modeling technology of SWAM Viola for iOS, now featuring the revolutionary Room Simulator "Ambiente"! Unlike sampled libraries, this virtual instrument doesn’t play pre-recorded sounds but generates authentic string performances in real-time, responding dynamically to your every nuance, just like a real violist. These instruments are NOT sample libraries. Unlike sampling, which uses recordings to replicate the sound of an instrument, physical modeling doesn’t generate a sound as such but creates the conditions for the system to create it according to an external input (like someone playing on a keyboard). This means every note is unique, and the instrument responds dynamically to your playing style. With SWAM Viola, you can unleash your creativity across any musical style—from classical to modern, film scoring to microtonal music. Whether you're performing live or producing music on the go, SWAM Viola is your ultimate companion. New Features and Key Benefits: Room Simulator "Ambiente": Take advantage of advanced spatial control with the built-in Room Simulator "Ambiente," which allows you to position the instrument in a realistic acoustic space, interact dynamically with other SWAM instruments in the same virtual room, and create truly immersive performances. Additionally, the legacy Reverb, EQ, and Compressor effects are available for fine-tuning your sound. Standalone and AUv3 Plugin: Perform in real time or integrate SWAM Viola seamlessly into your mobile production workflow. Intuitive, Inclusive Interface: Designed for everyone, including blind and visually impaired users. Expressive Control: Play with unmatched expressivity using the exclusive virtual bowing surface, MPE controllers, keyboards, breath controllers, or other MIDI devices. Top Features at a Glance: Access a library of presets, create your own, or import presets from the desktop version. Customize every detail of your sound, including timbre, vibrato, and dynamics. Micro-tune the instrument with the Pitch Manager, supporting devices like MAQAM for advanced tuning systems. Add built-in effects like EQ, and Compressor. Play with different viola bodies to explore unique tonal variations. Use AUv3 to integrate with your mobile DAW (Logic, Cubasis, AUM) or apps like Camelot PRO for live performances. Who is SWAM Viola for iOS Designed For? Wind Controller Players: Looking for a mobile setup to perform live without needing a computer while still achieving an incredible sound. Keyboard Players: Frustrated by the limited expressive capabilities of normal sample-based plugins? SWAM Viola unlocks the full range of expression. Music Producers: Need a mobile setup to produce music from anywhere without carrying around expensive gear? SWAM Viola is the solution. Musicians Seeking Expressivity: Looking for a virtual instrument that allows you to express the full range of your musicality easily on your iPhone or iPad. IMPORTANT: To fully harness the expressive power of SWAM Viola, a controller capable of continuous expression (such as a breath controller, expression pedal, MPE device, or wind controller) is required. Just like a bow is essential for a real violist, SWAM Viola needs expressive input for maximum realism. With SWAM Viola for iOS, you have the freedom to create lifelike string performances on your iPhone or iPad. Redefine your music with unparalleled realism and expressive depth—anytime, anywhere.

Screenshots

AudioLayer4 screens
SWAM Viola4 screens

Verdict

The call

The clearest difference is price: AudioLayer at $12.99 against SWAM Viola's $29.99. AudioLayer also leads on ratings volume (181 vs 6) and update cadence (fortnightly vs every 5 weeks). SWAM Viola's advantage is review sentiment (100% vs 56%) and in-app purchases (none vs 1). On rating, ads and device support 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

AudioLayer costs $12.99 and SWAM Viola $29.99 up front. AudioLayer sells 1 one-off in-app purchase. SWAM Viola asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for AudioLayer against 4.3 for SWAM Viola. That said, the two scores are not equally well evidenced: AudioLayer has 181 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 56% of AudioLayer's written reviews are positive against 100% of SWAM Viola's.

UpkeepUpdate frequency

AudioLayer ships an update fortnightly, SWAM Viola every 5 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard7 real differences · 3 level
AudioLayer versus SWAM Viola: the parameters behind the verdict, then further details
ParameterAudioLayerSWAM Viola
Price$12.99 — better$29.99
Rating4.3 (181 ratings)4.3 (6 ratings) — better
Positive reviews56.3% of reviews100.0% of reviews — better
Number of ratings181 — better6
Update frequencyFortnightly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size242 MB103 MB
Age rating4+4+
DeveloperHarry GohsAudio Modeling

Customer experience

AudioLayer

All ratings179 ratings
Positive81.6%
Neutral5.6%
Negative12.8%
Written reviews126 reviews
Positive56.3%
Neutral15.9%
Negative27.8%

SWAM Viola

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

AudioLayer

Reported bugs

17 issues
  • App crashes on startup (splash screen)
  • Reverb and chorus effects cause sound to disappear
  • Pitch resets to -24 after stopping Logic Pro playback
  • Layer voice polyphony controls not working properly
  • SFZ batch import distributes samples incorrectly across layers
Show 12 more
  • EXS24 import fails for complex instruments (pianos, drum kits)
  • MIDI source names display as 'Unknown Name'
  • Plugin window resizing required to access all controls
  • Sample end marker positioning doesn't work in all view sizes
  • Soundfont import module shows as missing despite purchase
  • App becomes unresponsive when loading complex instruments
  • Control Change 11 (Expression) not received
  • Autosampler function button missing after update
  • Settings not saved properly as AUv3 plugin
  • Instrument loading defaults to first instrument in host
  • Click/pop noises in sustain loops
  • Inter-Audio (IAA) compatibility broken

Requested features

17 requests
  • Time-stretching/pitch-shifting capability
  • Program Change MIDI support
  • Undo/Redo functionality
  • GigaSampler .gig library support
  • Soundfont SF2 import (now paid feature)
Show 12 more
  • MIDI learn for real-time parameter control
  • Expression (CC11) and other CC support
  • Multi-output support for individual zone routing
  • Batch import and file management improvements
  • Instrument selection screen persistence in MIDI mode
  • Bit reduction effect for vintage sampler emulation
  • Better local file management and folder organization
  • Modulation wheel pitch control
  • Transposition features
  • Disk streaming for larger libraries
  • Macro/customizable GUI support
  • Purge unused samples function

SWAM Viola

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

AudioLayer

One-time1
  • SoundFont Import$3.99
None

SWAM Viola

No in-app purchases

Questions

Is AudioLayer free?
AudioLayer costs $12.99, and also offers in-app purchases.
Is SWAM Viola free?
SWAM Viola costs $29.99, with no in-app purchases.
Which has better reviews, AudioLayer or SWAM Viola?
SWAM Viola is rated higher. AudioLayer averages 4.3 out of 5 from 181 ratings, while SWAM Viola averages 4.3 from 6 ratings.
Do AudioLayer or SWAM Viola have ads?
Neither AudioLayer nor SWAM Viola shows ads.
Which is updated more often, AudioLayer or SWAM Viola?
AudioLayer ships an update fortnightly, and SWAM Viola every 5 weeks. Most recently, AudioLayer was updated on October 23, 2026 and SWAM Viola on October 25, 2026.

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