# Soundtract vs BounceBud Physics Based MIDI

The clearest difference is review sentiment: BounceBud Physics Based MIDI at 100% against Soundtract's 50%. BounceBud Physics Based MIDI also leads on rating (5.0 vs 2.0) and update cadence (every 3 weeks vs every 3 months). Soundtract's advantage is price (Free vs $3.99) and iOS requirement (6.1 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

Soundtract is free to download; BounceBud Physics Based MIDI costs $3.99 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 2.0. That said, the two scores are not equally well evidenced: BounceBud Physics Based MIDI has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of Soundtract's written reviews are positive against 100% of BounceBud Physics Based MIDI's.

Soundtract ships an update every 3 months, BounceBud Physics Based MIDI every 3 weeks. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Soundtract | BounceBud Physics Based MIDI |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/soundtract/id816817050/reviews) | **[5.0 (11 ratings)](https://appshunter.io/ios/app/bouncebud-physics-based-midi/id6464171933/reviews)** |
| Number of ratings | 1 | **11** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 8 MB | 6 MB |
| Requires iOS | **6.1** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alex Shaykevich](https://appshunter.io/developer/816817053) | [Cem Olcay](https://appshunter.io/developer/523633853) |

## What reviewers say

### Soundtract

[App page](https://appshunter.io/ios/app/soundtract/id816817050)

This app simplifies transcribing field recordings and aids musicians learning by ear. It offers real-time, sophisticated noise reduction using spectral subtraction, allowing users to clean audio from recordings and videos. Additional features include audio isolation, tempo reduction, and various export options.

**Highlights:** Real-time spectral subtraction noise reduction, Import audio from videos, Zoom and isolate audio portions, Tempo reduction up to 70%, Export to m4a and mov formats, Video re-export with cleaned audio

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Soundtract free?

Soundtract is free to download, with no in-app purchases.

### Is BounceBud Physics Based MIDI free?

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

### Which has better reviews, Soundtract or BounceBud Physics Based MIDI?

BounceBud Physics Based MIDI is rated higher. Soundtract averages 2.0 out of 5 from 1 ratings, while BounceBud Physics Based MIDI averages 5.0 from 11 ratings.

### Do Soundtract or BounceBud Physics Based MIDI have ads?

Neither Soundtract nor BounceBud Physics Based MIDI shows ads.

### Which is updated more often, Soundtract or BounceBud Physics Based MIDI?

Soundtract ships an update every 3 months, and BounceBud Physics Based MIDI every 3 weeks. Most recently, Soundtract was updated on October 7, 2026 and BounceBud Physics Based MIDI on October 24, 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.*