Comparison

Beatly Pro vs GSDSP Quantum Delay

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

Head to head
About

Beatly Pro

Generate unlimited original looped music in various genres. Features include a powerful piano roll, chord progression builder, and stem exporting. Ideal for creators needing unique soundtracks.

Highlights
  • Unlimited original looped music generation
  • Multiple genre styles (rap, lo-fi, chiptune, cinematic, dance)
  • Advanced piano roll with undo and pattern editor
  • Chord progression builder
  • Export to MIDI and render stems
  • Sample recorder and import
  • Audiobus and Ableton Link sync support
Features
Currently charting
Read full description

With Beatly Pro you can generate unlimited amount of 100% original looped music in rap/lo-fi/chiptune/cinematic/dance genre. Features: - up to 8 bars of music to combine arbitrarily - up to 7 instruments to work with - effects and filters on each channel for shaping the sound (low pass filter, decimation) - simple yet powerful piano roll with undo, realtime beat transpositions, key locks and custom template pattern editor (patterns applicable automatically in the generated music) - chord progression builder - exporting to MIDI (including stems) - rendering stems and seamless loops - key and BPM options - mixer with volume, solo, mute and filters - regeneration of any instrument part - sample recorder and editor - sample import in WAV/M4A format, supporting drag and drop - SF2 SoundFont sound bank import - MIDI files import (single bars only) in the piano roll, supporting drag and drop - drum presets - song mode which automatically arranges the generated bars for you - MIDI output with configurable output channels and notes (for drum instruments) - Audiobus support (MIDI out per channel + full audio mix) - Ableton Link sync support - app color theme configurator Who is Beatly Pro for: • composers/producers to get quick inspiration or a fresh material to work with • artists/singers in need of unique rap beats on demand • game developers, film-makers, digital content creators, who need to use free and original music in any kind of multimedia • musicians who need an accompaniment for their practicing (thanks to the chord progression builder you can simply define what you want Beatly to play) • pretty much anyone interested in generative art and nonmainstream music How it works: Beatly Pro randomly chooses set of instruments and creates 8 unique bars of looped instrumental music (32 beats). You can combine and rearrange these bars arbitrarily and edit them in piano roll. Tempo is chosen automatically, however it can be simply changed as well as key. All notes are picked by the algorithm. Currently you can choose from default rap, lo-fi, chiptune, cinematic or dance styles. Each of these styles brings unique music experience. You can also activate chord progression builder to define exactly what chords will Beatly use in the generated bars or create your own bar patterns which will be consequently used by the algorithm when building a new track. To modify already generated chord progression in the track you can change key/base chord of each beat within a bar. All notes of given beat will be transposed appropriately. Run app, tap the play button. It is that simple. Music will be different each time you hit the reload button. Once you're done editing the tune, simply save it for later, export to MIDI or record your live session to WAV audio file. You can even render separated stems or seamless loop of your entire track. You can also hook up Beatly with your favorite mixer using MIDI output. Drums too loud? Adjust the volume. Synth annoying? Mute it or try other built-in sounds. Loving the sound of piano? Solo it and make it shine. Mixer got your back! Need variation? Reload any instrument part of your track. Generated part not to your liking? Leverage the piano roll to fix algorithm's mistakes and make it awesome! Can I import my own samples? Yes! You can attach or record your very own WAV or M4A sound to any instrument track. Just bear in mind, samples tuned in C will sound best! :) If you like Beatly Pro, please, support us by rating this app in the App Store or donating via in-app purchase. If you have any idea how to improve Beatly Pro, please, leave us a message! Thank you!

About

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.

Highlights
  • 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)
Features
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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

Beatly Pro4 screens
GSDSP Quantum Delay3 screens

Verdict

The call

The clearest difference is price: Beatly Pro at $4.99 against GSDSP Quantum Delay's $14.99. Beatly Pro also leads on chart position (#180 vs unranked) and update cadence (every 2 weeks vs every 5 weeks). GSDSP Quantum Delay's advantage is in-app purchases (none vs 2) and rating (4.8 vs 4.5). On ratings volume, ads 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

Beatly Pro costs $4.99 and GSDSP Quantum Delay $14.99 up front. Beatly Pro sells 2 one-off in-app purchases. GSDSP Quantum Delay asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GSDSP Quantum Delay holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 37 and 17 respectively. Written reviews point the same way: 81% of Beatly Pro's written reviews are positive against 100% of GSDSP Quantum Delay's.

UpkeepUpdate frequency

Beatly Pro ships an update every 2 weeks, GSDSP Quantum Delay every 5 weeks. The most recent releases landed on September 19, 2026 and September 22, 2026 respectively.

Scorecard8 real differences · 3 level
Beatly Pro versus GSDSP Quantum Delay: the parameters behind the verdict, then further details
ParameterBeatly ProGSDSP Quantum Delay
Price$4.99 — better$14.99
Rating4.5 (37 ratings)4.8 (17 ratings) — better
Positive reviews81.5% of reviews100.0% of reviews — better
Number of ratings37 — better17
Update frequencyEvery 2 weeks — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank#180 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.012.0 — better
Further details — not scored
Size77 MB94 MB
Age rating4+4+
DeveloperAntonin CharvatGustav Scholda

Customer experience

Beatly Pro

All ratings37 ratings
Positive89.2%
Neutral2.7%
Negative8.1%
Written reviews27 reviews
Positive81.5%
Neutral7.4%
Negative11.1%

GSDSP Quantum Delay

All ratings17 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Beatly Pro

One-time2
  • Small tip$1.99
  • Large tip$3.99
None

GSDSP Quantum Delay

No in-app purchases

Questions

Is Beatly Pro free?
Beatly Pro costs $4.99, and also offers in-app purchases.
Is GSDSP Quantum Delay free?
GSDSP Quantum Delay costs $14.99, with no in-app purchases.
Which has better reviews, Beatly Pro or GSDSP Quantum Delay?
GSDSP Quantum Delay is rated higher. Beatly Pro averages 4.5 out of 5 from 37 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.
Do Beatly Pro or GSDSP Quantum Delay have ads?
Neither Beatly Pro nor GSDSP Quantum Delay shows ads.
Which is updated more often, Beatly Pro or GSDSP Quantum Delay?
Beatly Pro ships an update every 2 weeks, and GSDSP Quantum Delay every 5 weeks. Most recently, Beatly Pro was updated on September 19, 2026 and GSDSP Quantum Delay on September 22, 2026.

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