Comparison

isfizz vs Stellarvox

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

Head to head
About

isfizz

This app plays SFZ files, an open format for sampled sound instruments. It supports various audio file formats, MIDI, and Scala tuning files. It also functions as an Audio Unit Extension (AUv3) for use with other music apps.

Highlights
  • SFZ file playback
  • Audio Unit Extension (AUv3) support
  • Edit SFZ strings
  • Load SFZ files in place
  • Scala tuning file support
  • MIDI support
Features
Read full description

isfizz is a SFZ file player. SFZ is an open text format for sampled sound instruments. This app can load SFZ and play the instrument. - Includes Audio Unit Extension (AUv3). - You can edit SFZ string. - The app loads SFZ files in place without copying the files. - Double tap to enter the value, triple tap to reset. - Supports Scala tuning files (.scl). - Supports MIDI. - Supports 16 out. use the "output=N" opcode in SFZ. Supported sample file format: - .wav (raw PCM) - .aiff - .mp3 - .flac - .ogg (vorbis) - .wv (wavpack) This app is an iPhone/iPad port of sfizz-ui project. The app is made from some sfizz-ui codes and images. About half of the income from this app will be donated to SFZ Tools team. This app and the description contain machine translated text.

About

Stellarvox

Design immersive ambient soundscapes with a hybrid reverb and artificial space designer. Create lush textures, deep spaces, and whispering backgrounds for electronic, experimental, and sound design projects. Offers intuitive controls and inspiring presets for quick, high-quality results.

Highlights
  • Hybrid reverb with artificial space designer
  • Algorithmic reflections tail processing
  • Dynamic timbre changes over time
  • Geometry and dimension control
  • Factory presets and random feature
  • MIDI learn support
  • Standalone and AUv3 module
Features
Currently charting
Read full description

Hybrid reverb with an artificial space designer, combining it with algorithmic reflections tail processing, is ideal to creating immersive ambience of deep spaces, lush atmospheric textures or stunning whispering backgrounds in your ambient, electronic, experimental and sound design projects. Unlike traditional algorithmic reverbs, Stellarvox constructs a complex model of a vast resonant sound spaces with choice of geometry, dimensions and tonal structure of the space, along with a unique feature that dynamically change the timbre of reflections over the reverberation time. The second algorithmic reverb allows you to prolong and blur reflections, adding extra dimensions to the sound space. Easy-to-use controls on a single screen, along with optimally designed parameters that always give great results, make insignificant the peculiarity of that kind of reverbs, when the model creates with a little delay after changing it. Factory presets and the random feature will give you a starting point of inspiration and allow you to get a quick result where you need just to slightly tweak the parameters to align with your idea. This application is great for ambient projects, it can create mesmerizing atmosphere from single infrequent sounds of various instruments, or giving a beautiful and deep backgrounds to sharp sequences in electronics, as well as for any experimental projects that require unusual, deep and rich sound ambience. Stellarvox is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac / MacBook with M1 chip (and later). Stellarvox works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, with supports Audiobus host app. On MacOS, Stellarvox can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. All application features are available on iOS and macOS, including MIDI support (with a MIDI learn option) and audio unit parameters. Stellarvox has a built-in detailed description of all parameters also available as PDF file on the application site. Sound demo: https://www.youtube.com/watch?v=TEtZfvLtJy8 https://www.youtube.com/watch?v=FqCYa1tp2Qw You can find more information on Stellarvox and other audio apps at: https://motion-soundscape.blogspot.com

Screenshots

isfizz4 screens
Stellarvox3 screens

Verdict

The call

The clearest difference is price: isfizz at $2.99 against Stellarvox's $11.99. isfizz also leads on update cadence (fortnightly vs every 5 months). Stellarvox's advantage is rating (5.0 vs 4.7) and chart position (#191 vs unranked). 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

CostPrice · In-app purchases · Ads · Monetization

isfizz costs $2.99 and Stellarvox $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stellarvox holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 14 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

isfizz ships an update fortnightly, Stellarvox every 5 months. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 7 level
isfizz versus Stellarvox: the parameters behind the verdict, then further details
ParameterisfizzStellarvox
Price$2.99 — better$11.99
Rating4.7 (14 ratings)5.0 (11 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings14 — better11
Update frequencyFortnightly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#191 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size6 MB4 MB
Age rating4+4+
DeveloperRyouta KiraIgor Vasiliev

Customer experience

isfizz

All ratings14 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Stellarvox

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

isfizz

No in-app purchases

None

Stellarvox

No in-app purchases

Questions

Is isfizz free?
isfizz costs $2.99, with no in-app purchases.
Is Stellarvox free?
Stellarvox costs $11.99, with no in-app purchases.
Which has better reviews, isfizz or Stellarvox?
Stellarvox is rated higher. isfizz averages 4.7 out of 5 from 14 ratings, while Stellarvox averages 5.0 from 11 ratings.
Do isfizz or Stellarvox have ads?
Neither isfizz nor Stellarvox shows ads.
Which is updated more often, isfizz or Stellarvox?
isfizz ships an update fortnightly, and Stellarvox every 5 months. Most recently, isfizz was updated on September 19, 2026 and Stellarvox on September 22, 2026.

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