# BounceBud Physics Based MIDI vs GSDSP Quantum Delay

The clearest difference is price: BounceBud Physics Based MIDI at $3.99 against GSDSP Quantum Delay's $14.99. BounceBud Physics Based MIDI also leads on rating (5.0 vs 4.8). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

BounceBud Physics Based MIDI costs $3.99 and GSDSP Quantum Delay $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BounceBud Physics Based MIDI holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 11 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Both ship on a similar rhythm, roughly every 5 weeks. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | BounceBud Physics Based MIDI | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$3.99** | $14.99 |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/bouncebud-physics-based-midi/id6464171933/reviews)** | [4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews) |
| Number of ratings | 11 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 6 MB | 94 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cem Olcay](https://appshunter.io/developer/523633853) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### BounceBud Physics Based MIDI

[App page](https://appshunter.io/ios/app/bouncebud-physics-based-midi/id6464171933)

This app generates MIDI notes through a unique physics-based system. Balls collide with customizable keyboards, triggering MIDI events. It offers extensive control over note scales, velocity, and MIDI channels for diverse musical creations.

**Highlights:** Physics-based generative MIDI sequencing, Customizable keyboards with MIDI note triggers, Adjustable ball count, speed, and size, Configurable key/scale, velocity, and octave ranges, Individual MIDI output per keyboard, MIDI input for 'shoot walls' interaction, Toggleable ball collision behavior

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GSDSP Quantum Delay

[App page](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297)

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:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is BounceBud Physics Based MIDI free?

BounceBud Physics Based MIDI costs $3.99, with no in-app purchases.

### Is GSDSP Quantum Delay free?

GSDSP Quantum Delay costs $14.99, with no in-app purchases.

### Which has better reviews, BounceBud Physics Based MIDI or GSDSP Quantum Delay?

BounceBud Physics Based MIDI is rated higher. BounceBud Physics Based MIDI averages 5.0 out of 5 from 11 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.

### Do BounceBud Physics Based MIDI or GSDSP Quantum Delay have ads?

Neither BounceBud Physics Based MIDI nor GSDSP Quantum Delay shows ads.

### Which is updated more often, BounceBud Physics Based MIDI or GSDSP Quantum Delay?

BounceBud Physics Based MIDI ships an update every 5 weeks, and GSDSP Quantum Delay every 5 weeks. Most recently, BounceBud Physics Based MIDI was updated on September 21, 2026 and GSDSP Quantum Delay on September 22, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*