Comparison

TfxEcho vs Stellarvox

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

Head to head
About

TfxEcho

This audio plugin offers a warm, dark echo effect inspired by analog delay units. It allows for adjustable delay times, feedback, and filters, with modulation capabilities and tempo syncing. The plugin captures high-frequency signals for a versatile sound.

Highlights
  • Echo and delay effect
  • BBD-inspired delay lines
  • Adjustable delay time (20-1200 ms)
  • Feedback control (0-100%)
  • Low-pass and high-pass filters
  • Modulation rate and width
  • Tempo sync
Features
Read full description

TfxEcho is an echo effect AudioUnit Extension plugin. It uses delay lines which are inspired by BBD (bucket brigade device). BBD is used in various analog delay unit and is known for its warm and dark sound. The delay line uses fixed length buffer and an artificial clock to sample input signal in variable sampling rate. When the delay time is changed, the delay line can produce pitch change effect which is similar to the behavior of the BBD based analog delay unit. The delay line is inspired by BBD, but it is not emulation of the any particular BBD. Unlike the typical BBD based delay unit, frequency range of the delay line is not limited. The delay line is capable to capture signal in higher frequency up to about 22KHz. Features AudioUnit Extension - Delay Time: From 20 ms to 1200 ms - Feedback: From 0 % to 100 % - Adjustable lowpass filter and high-pass filter. - Modulation rate: From 0.01 Hz to 10 Hz - Modulation width: From 0 ms to +/- 10 ms - Delay time can be synced to tempo provided by the host application. Host Application Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.

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
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

TfxEcho2 screens
Stellarvox3 screens

Verdict

The call

The clearest difference is price: TfxEcho at $4.99 against Stellarvox's $11.99. TfxEcho also leads on iOS requirement (13.5 vs 15.0). Stellarvox's advantage is rating (5.0 vs 4.7) and review sentiment (100% vs 80%). On ratings volume, update cadence, 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

TfxEcho costs $4.99 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 — 12 and 11 respectively. Written reviews point the same way: 80% of TfxEcho's written reviews are positive against 100% of Stellarvox's.

UpkeepUpdate frequency

TfxEcho ships an update every 3 months, Stellarvox every 5 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

Scorecard4 real differences · 6 level
TfxEcho versus Stellarvox: the parameters behind the verdict, then further details
ParameterTfxEchoStellarvox
Price$4.99 — better$11.99
Rating4.7 (12 ratings)5.0 (11 ratings) — better
Positive reviews80.0% of reviews100.0% of reviews — better
Number of ratings12 — better11
Update frequencyEvery 3 months — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.5 — better15.0
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperRyo TogawaIgor Vasiliev

Customer experience

TfxEcho

All ratings12 ratings
Positive91.7%
Neutral0.0%
Negative8.3%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

Stellarvox

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

In-app purchases

None

TfxEcho

No in-app purchases

None

Stellarvox

No in-app purchases

Questions

Is TfxEcho free?
TfxEcho costs $4.99, with no in-app purchases.
Is Stellarvox free?
Stellarvox costs $11.99, with no in-app purchases.
Which has better reviews, TfxEcho or Stellarvox?
Stellarvox is rated higher. TfxEcho averages 4.7 out of 5 from 12 ratings, while Stellarvox averages 5.0 from 11 ratings.
Do TfxEcho or Stellarvox have ads?
Neither TfxEcho nor Stellarvox shows ads.
Which is updated more often, TfxEcho or Stellarvox?
TfxEcho ships an update every 3 months, and Stellarvox every 5 months. Most recently, TfxEcho was updated on October 7, 2026 and Stellarvox on October 9, 2026.

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