MolliLooper vs GSDSP Quantum Delay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MolliLooper
This real-time stereo effect app allows for instant looping and filtering of audio. Designed for live performance, it continuously records input for immediate playback and offers adjustable loop timing synced to a host clock. It also features a resonant filter and stutter/freeze capabilities.
- Real-time stereo looping
- Instant recording/looping
- Host clock sync
- Adjustable loop timing
- Lowpass/highpass resonant filter
- Stutter/freeze effect
- AUv3 plugin support
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Molli Looper is a realtime stereo effect for looping and filtering. Intended mainly as a live performance tool, no preparation is needed to trigger loop recording - input is constantly recorded in the background to be triggered whenever it is needed. Loop timing is synced to host clock, and can be adjusted from multi-bar loops right down to 16th note drills. The looped or unlooped audio is then passed though a lowpass -> neutral -> highpass resonant filter, based on a 4 pole ladder design for lush analogue style sound. You can use Molli Looper either as iOS Standalone app or as AUv3 plugin. FEATURES: - Combination of looper and stutter/freeze - Continuous recording: instant recording/looping - Runs in sync with host clock - Jumps to meaningful places in the recording: "Snap to grid" - Grid: 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, 16, 32 beats - Ability to scroll through the recording - Lowpass/highpass resonant filter - Long Tap XY keeps filter position - Limiter/booster effect - Momentary Mode - Tap on Molli Looper icon for basic information
GSDSP Quantum Delay
This app offers a vintage-inspired stereo delay effect with advanced modulation, flexible filtering, and precise timing controls. It allows users to sculpt unique echo textures, from warm analog sounds to complex, evolving soundscapes.
- Vintage-inspired stereo delay
- Deep modulation system
- Flexible filtering (LPF, HPF, BPF)
- Precise timing controls (BPM, ms)
- Switchable stereo/dual mono modes
- Advanced modulation sources (LFO, Random, Envelope)
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A vintage-inspired delay supercharged with deep modulation, flexible filtering, and creative timing that pushes echoes into new dimensions. Classic Delay, Reinvented Quantum Delay takes the charm of a vintage stereo delay and fuses it with our next-level modulation system. Switch between the warm character of Tape mode and the pristine clarity of Fade mode, lock to BPM (including 5-tuplets) or dial in precise times in milliseconds. Use the Fine control for subtle push-and-pull micro-timing — or modulate your delay lines in ways traditional delays could only dream of. Sculpted Echoes Shape your repeats with switchable lowpass, highpass, and bandpass filters placed directly in the feedback path. Add modulation to create evolving tones, gentle movement, or drifting, frequency-shifting echoes. From warm analog-style rolls to shimmering, swirling textures, it’s all there. Feedback with Precision Control your delay tail behavior using either traditional % feedback or our modern dB-per-second decay system — ideal for predictable, musical decay even when the feedback path becomes complex. Enable Crossfeed for classic ping-pong stereo bounce, or push into Over-Feedback to create dense, self-building echoes that drift toward infinity. Stereo or Dual Mono Every section of Quantum Delay — delay, filter, and feedback — can switch between stereo and dual mono modes. Create tight, controlled stereo images or break them apart for wide, offset, unpredictable spaces. Dual mono modulation unlocks complex stereo interplay and beautifully asymmetric echoes. Modulation Without Limits Quantum Delay integrates our advanced modulation system, letting you modulate nearly anything: delay time, filters, feedback parameters, stereo controls, and more. Use LFOs, Random Generators, 2D modulators, Envelope Followers, Macros, and even chaotic systems to push your echoes far beyond traditional delay behavior. Or use our parameter randomisation feature to explore the plugin’s sound at random. Quantum Delay is an AUv3 audio effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products
Screenshots
Verdict
The clearest difference is price: MolliLooper at $8.99 against GSDSP Quantum Delay's $14.99. MolliLooper also leads on iOS requirement (11 vs 13.0). GSDSP Quantum Delay's advantage is review sentiment (100% vs 82%). On rating, 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
MolliLooper costs $8.99 and GSDSP Quantum Delay $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MolliLooper holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 13 and 17 respectively. Written reviews complicate that: 82% of MolliLooper's written reviews are positive against 100% of GSDSP Quantum Delay's, so the app with the better star average is not the one people write more warmly about.
MolliLooper ships an update every 2 months, GSDSP Quantum Delay every 6 weeks. Both last shipped on November 3, 2026.
| Parameter | MolliLooper | GSDSP Quantum Delay |
|---|---|---|
| Price | $8.99 — better | $14.99 |
| Rating | 5.0 (13 ratings) — better | 4.8 (17 ratings) |
| Positive reviews | 81.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 13 | 17 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 11 — better | 13.0 |
| Further details — not scored | ||
| Size | 9 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | Oliver Greschke (DE) | Gustav Scholda |
Customer experience
MolliLooper
GSDSP Quantum Delay
In-app purchases
MolliLooper
No in-app purchases
GSDSP Quantum Delay
No in-app purchases








