QVox vs FeedbackGuard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QVox
This app transforms audio into four independent voices with pitch shifting and delay. Create harmonies, widen instruments, and design rhythmic sequences by controlling key, scale, and voice parameters in real-time.
- Four independent voices with pitch shifting and delay
- Selectable key and scale for harmonies
- Adjustable delay intervals and tempo sync
- Real-time parameter control with Ribbon controller
- Factory and user presets
- Mixlock for consistent auditioning
- AUv3 plugin and Standalone app
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QVox is a creative audio effect that transforms vocals, guitars, drums, and synths into four independent voices. Create beautiful harmonies, widen instruments and design groovy rhythmic sequences with diatonic pitch shifting and delay. You can choose the key, scale, and each voice’s pitch and delay interval, with the ability to alter any parameters in real-time using the Ribbon controller. Features: - Four independent voices (labeled as A, B, C, D) with diatonic pitch shifting and delay. - Select Key and Scale to create harmonies that coincide with your compositions or use the Learn button to set the key by the incoming note you play. - Group the four delays so that they are evenly spaced or spread out. - Sync the delays to tempo, or a value of your own choosing. - The Ribbon controller allows for dynamic modification of several knobs at once to easily morph between settings. - Factory presets help get you started or create your own User presets. - Mixlock helps when auditioning different presets by enabling a global Mix value that will remain constant for every subsequently loaded preset. - Available as an Audio Units AUv3 plug-in and Standalone App.
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.
- 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
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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
Verdict
The clearest difference is price: FeedbackGuard at $3.99 against QVox's $14.99. FeedbackGuard also leads on rating (5.0 vs 4.3) and review sentiment (100% vs 64%). QVox's advantage is ratings volume (17 vs 1) and iOS requirement (11.0 vs 17.0). On ads, in-app purchases, monetization model 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
QVox costs $14.99 and FeedbackGuard $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
FeedbackGuard holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: QVox has 17 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 64% of QVox's written reviews are positive against 100% of FeedbackGuard's.
QVox ships an update every 5 months, FeedbackGuard every 4 days. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.
| Parameter | QVox | FeedbackGuard |
|---|---|---|
| Price | $14.99 | $3.99 — better |
| Rating | 4.3 (17 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 63.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 17 — better | 1 |
| Update frequency | Every 5 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 22 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Eventide | Norwin Palme |
Customer experience
QVox
FeedbackGuard
In-app purchases
QVox
No in-app purchases
FeedbackGuard
No in-app purchases
Questions
Is QVox free?
Is FeedbackGuard free?
Which has better reviews, QVox or FeedbackGuard?
Do QVox or FeedbackGuard have ads?
Which is updated more often, QVox or FeedbackGuard?
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