Comparison

Multi vs FeedbackGuard

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

Head to head
About

Multi

Read full description

This is a AUv3 compatible audio effect which can be used as plugin with your favourite DAW such as Cubasis, Meteor, Auria or GarageBand. It supports a modern graphical interface and presets with stereo meters for monitoring signal levels. The Multi-Tap delay takes the traditional digital delay to the next level. Instead of a single delay line you have up to 4 taps at your disposal. Each tap has an adjustable delay which can either be a value in milliseconds or a division of a beat. This is because the effect tracks the host tempo and can automatically match the beat by just pressing the sync button on each tap. Some taps can be free running while others synced to the beat. What really makes this type of delay shine is that fact you can choose to either have all taps play back in series or stack them end on end in parallel mode. This allows for some very creative and unusual patterns which are not achievable using a conventional delay. A dedicated LFO synced to the host tempo can also be used to apply modulation to each of the taps. You can modulate the frequency to create a chorus/ensemble type effect, vary the amplitude to create a vibrato effect, create an oscillating pan or even run the tap in reverse echo mode or through a band pass filter. This is a great tool to have at your disposal, allowing you to some unusual delay effects not available with a conventional delay. All parameters fully support automation. This is one of a suite of AUv3 compatible plugins which will also soon be available from 4Pockets.

About

FeedbackGuard

This audio effect plugin automatically detects and suppresses acoustic feedback in real-time. It uses advanced analysis to place precise notch filters, allowing for clear audio during live performances or recordings. Customize settings for optimal suppression without compromising sound quality.

Highlights
  • Real-time howling detection
  • Adaptive notch bank (up to 24 notches)
  • Live spectrum display
  • User-defined presets
  • Adjustable sensitivity and suppression
  • Optional harmonic tracking
  • Optional spectral noise reduction
Features
Read full description

FeedbackGuard is an Audio Unit v3 effect that stops acoustic feedback before it ruins your performance. Whether you are singing live, speaking on stage, or recording vocals on iPad, FeedbackGuard listens for runaway howling and automatically places precise notch filters — so you can focus on the show, not the squeal. HOW IT WORKS FeedbackGuard uses PNPR (Peak-to-Neighbourhood Power Ratio) analysis combined with a growth check to tell real feedback apart from normal voice, speech, or room tone. When a howling peak starts to build, the plugin tracks it with parabolic peak detection and deploys an adaptive notch bank that reacts in milliseconds. Designed for live use: attack and release times, suppression depth, and notch count are all under your control. KEY FEATURES • Real-time howling detection (PNPR + run-up check) • Adaptive notch bank — up to 24 simultaneous notches • Live spectrum display with active notch markers • "Balanced" preset for safe, transparent defaults • 3 user preset slots — tap to recall, hold to save • Fine-tuned controls: Sensitivity, Notch Threshold, Suppression, Q, Attack, Release • Optional harmonic tracking for stubborn feedback tones • Optional spectral noise reduction for quiet passages • Full bypass GET STARTED IN SECONDS 1. Open your AUv3 host (GarageBand, AUM, Cubasis, and more) 2. Insert FeedbackGuard as an audio effect on your vocal or monitor channel 3. Tap "Balanced" for recommended live settings 4. Raise Notch Threshold if notches appear on voice or room tone IDEAL FOR • Live vocals and speech • Rehearsals, worship, small PA setups • Mobile recording rigs on iPhone and iPad • Any situation where monitor feedback is a risk COMPATIBILITY • Audio Unit v3 (aufx) effect • iPhone and iPad • Works in any AUv3-compatible host • Mono or stereo, sample rates from 8 kHz to 192 kHz FeedbackGuard — Adaptive Feedback Suppressor by Norwin Palme.

Screenshots

Multi2 screens
FeedbackGuard2 screens

Verdict

The call

The clearest difference is update cadence: FeedbackGuard at every 4 days against Multi's every 22 months. FeedbackGuard also leads on price ($3.99 vs $4.99). Multi's advantage is iOS requirement (13 vs 17.0). On ads, in-app purchases 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

Multi costs $4.99 and FeedbackGuard $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Multi ships an update every 22 months, FeedbackGuard every 4 days. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

Scorecard3 real differences · 7 level
Multi versus FeedbackGuard: the parameters behind the verdict, then further details
ParameterMultiFeedbackGuard
Price$4.99$3.99 — better
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 22 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13 — better17.0
Further details — not scored
Size7 MB4 MB
Age rating4+4+
Developer4Pockets.comNorwin Palme

In-app purchases

None

Multi

No in-app purchases

None

FeedbackGuard

No in-app purchases

Questions

Is Multi free?
Multi costs $4.99, with no in-app purchases.
Is FeedbackGuard free?
FeedbackGuard costs $3.99, with no in-app purchases.
Do Multi or FeedbackGuard have ads?
Neither Multi nor FeedbackGuard shows ads.
Which is updated more often, Multi or FeedbackGuard?
Multi ships an update every 22 months, and FeedbackGuard every 4 days. Most recently, Multi was updated on September 30, 2026 and FeedbackGuard on October 2, 2026.

Other comparisons