Comparison

Stereo Delay vs TfxReverb

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

Head to head
About

Stereo Delay

This audio unit plugin creates natural-sounding stereo delays with unique panning that expands stereo width without sounding repetitive. It features filters and a mixing matrix for dynamic echo placement, ideal for adding depth to music.

Highlights
  • Unique stereo panning matrix
  • Natural, moving stereo echo
  • Low-cut and hi-cut filters
  • Feedback control
  • LFO controlled pan
  • Requires host app
Features
Currently charting
Read full description

Blue Mangoo Stereo Delay is designed to be the go-to app a for simple, musically tasteful delay effect. The most unique feature is the way it handles panning of delayed echoes in the stereo field. Most stereo delays set different delay times for the left and right channels, resulting in the famous ping-pong effect. The problem with the ping-pong stereo delay sound is that it's too extreme, and our ears quickly tire of hearing the same pattern of left-then-right delay repeated hundreds of times. This plugin does it differently. Instead of setting delay taps at different times panned hard left or right, it always keeps the same delay time setting for both the left and right channels, but it has a unique mixing matrix controlling the feedback between the left and right channels so that each time the echo repeats, it appears in a new place in the stereo field. This is different from a simple panning delay, because older echoes and newer ones can simultaneously appear at different positions in the stereo field. The result is a very natural stereo echo that expands the stereo width of the sound but doesn't sound repetitive or electronic. It's constantly moving and changing. The wet signal output has low-cut and hi-cut filters. The hi-cut filter tones down the harshness of the delay and makes it sound like natural echoes. The low-cut is especially useful for applying delay without making things sound muddy. At extreme settings the low cut can achieve a lo-fi telephone like delay sound. The signal flow diagram is as follows: Filters => LFO controlled pan => Stereo Delay Lines => Mixing matrix => Feedback to Delay Lines The dry signal (not shown above) bypasses the entire effect. The key difference between this and other delays is the mixing matrix, which is similar to the ones used in feedback delay network reverb effects to mix between multi-channel delays without changing the volume of the sound. It is the matrix (not the LFO) that creates the illusion that the signal has moved to a different location in the stereo field each time it repeats through the delays. *** THIS IS AN AUDIO UNIT ONLY EFFECT. IT REQUIRES A HOST APP SUCH AS AUM, Audiobus, GarageBand, OR Cubasis. IT DOES NOT RUN AS A STANDALONE APP. ***

About

TfxReverb

This audio plugin generates digital reverb effects using a unique algorithm. It offers simple operation with an auto-size mode that adjusts parameters with a single dial, and features delay lines inspired by vintage bucket brigade devices for creative pitch-shifting.

Highlights
  • AudioUnit Extension plugin
  • BBD-inspired delay lines
  • Adjustable input filters
  • LFO modulation
  • Tempo sync
  • Auto size mode
Features
Read full description

TfxReverb is a reverb effect AudioUnit Extension plugin. It uses algorithm to generate digital reverb sound. TfxReverb is designed for simple and easy operation. When auto size mode is enabled, number of parameters can be controlled by a single dial to adjust size of the reverb sound, which can be synced to tempo. It features delay lines which are inspired by BBD (bucket brigade device). 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 unit. Features AudioUnit Extension - Input lowpass filter: From 1KHz to 20KHz - Input high-pass filter: From 20Hz to 500Hz - LFO Frequency: From 0.01Hz to 10Hz - LFO Intensity: From 0.0 to 1.0 - Pre Delay: From 1ms to 100ms - Size: From 0% to 100% - Auto size mode: On / Off - Decay: From 0% to 100% - Damp: From 0% to 100% - Output Lowpass Filter: From 1KHz to 20KHz - Early/Late Mix: From 0% to 100% - Dry/Wet Mix: From 0% to 100% - Tempo Sync: On / Off - Tempo (manual) : From 1bpm to 999bpm - Effect Switch: On / Off Host Application Host application uses system audio input as an audio source and processed audio signal is routed to the system audio output.

Screenshots

Stereo Delay4 screens
TfxReverb4 screens

Verdict

The call

The clearest difference is rating: Stereo Delay at 4.8 against TfxReverb's 4.5. Stereo Delay also leads on chart position (#195 vs unranked) and price ($2.99 vs $4.99). On review sentiment, ratings volume, update cadence and ads 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

Stereo Delay costs $2.99 and TfxReverb $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Stereo Delay holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 5 and 8 respectively. Written reviews split almost evenly too, at 75% and 75% positive.

UpkeepUpdate frequency

Stereo Delay ships an update every 6 months, TfxReverb every 10 months. The most recent releases landed on September 11, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 7 level
Stereo Delay versus TfxReverb: the parameters behind the verdict, then further details
ParameterStereo DelayTfxReverb
Price$2.99 — better$4.99
Rating4.8 (5 ratings) — better4.5 (8 ratings)
Positive reviews75.0% of reviews75.0% of reviews
Number of ratings58 — better
Update frequencyEvery 6 months — betterEvery 10 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#195 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better13.6
Further details — not scored
Size2 MB2 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedRyo Togawa

Customer experience

Stereo Delay

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

TfxReverb

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

In-app purchases

None

Stereo Delay

No in-app purchases

None

TfxReverb

No in-app purchases

Questions

Is Stereo Delay free?
Stereo Delay costs $2.99, with no in-app purchases.
Is TfxReverb free?
TfxReverb costs $4.99, with no in-app purchases.
Which has better reviews, Stereo Delay or TfxReverb?
Stereo Delay is rated higher. Stereo Delay averages 4.8 out of 5 from 5 ratings, while TfxReverb averages 4.5 from 8 ratings.
Do Stereo Delay or TfxReverb have ads?
Neither Stereo Delay nor TfxReverb shows ads.
Which is updated more often, Stereo Delay or TfxReverb?
Stereo Delay ships an update every 6 months, and TfxReverb every 10 months. Most recently, Stereo Delay was updated on September 11, 2026 and TfxReverb on September 20, 2026.

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