Comparison

BounceBud Physics Based MIDI vs Mass

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

Head to head
About

BounceBud Physics Based MIDI

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
Read full description

BounceBud is a physics based, generative MIDI sequncer. Each side of the app has a customizable keyboard that send a MIDI note when a ball collide with its key. You can specify the ball count, speed and size on the main screen with the knob controls.  In the settings menu, you can set the key/scale, velocity range, octave. range and MIDI channel settings of the keyboards. You can also specify the notes individually per keyboard. All keyboards share the same key/scale that could also be changed with BrainBud. Each keyboard has its own MIDI output, so you can play different audio apps with BounceBud at once. Or you can disable the keyboard sides you don't want to use. With a MIDI input (from a MIDI keyboard or a MIDI sequencer app) you can 'shoot walls' from the keyboards. Balls can interact with the walls and it introduce more randomness to your generative sequence. You can control each keyboard by assigning them different MIDI input channels in the settings menu. You can also toggle the ball collision behavior in the settings menu. Whether balls can collide with each other or not, it creates different, interesting sequences every time. The size variety and ball variety can be change in the ball settings section in the settings menu. It adds randomisation to the size and speed values. You can change the ball color theme in the settings menu as well! BounceBud is a MIDI app and it does not produce any sound on its own. You need to route BounceBud's MIDI outs to your audio app's MIDI input. The AUv3 plugin app needs and AUv3 host app such as AUM, Loopy Pro, Logic Pro, Cubasis, Nanostudio, apeMatrix etc.

About

Mass

This app is a physics-based MIDI generator that allows musicians to create complex generative sequences, organic modulations, and explore boundless musical experimentation. It offers a powerful toolkit for creative control and can be used as a standalone application or an AUv3 plugin.

Highlights
  • Generative Sequences
  • Living Modulations
  • Euclidean Pattern Sequencing
  • Flexible MIDI CC
  • Physics-Based Animation
  • Standalone & AUv3 Plugin
  • MIDI Sync
  • iCloud Sync
Features
Read full description

Open the door to new musical dimensions with Mass — a physics-based MIDI generator crafted to inspire musicians across genres. Add complexity to your sequences, explore generative patterns, or create organic modulations; Mass is your gateway to boundless musical experimentation. • Generative Sequences: Sculpt intricate melodies and rhythms that evolve over time. • Living Modulations: Shape fluid, natural modulations that respond like living elements. • Total Creative Freedom: Need a spark of randomness or complete control? Mass lets you move seamlessly between guided automation and full improvisation. Whether you’re diving into ambient soundscapes, exploring the depths of MIDI control, or crafting intricate modulations, Mass is your key to immersive sonic worlds. Available as a standalone MIDI generator and AUv3 plugin, Mass transforms your favorite hardware and software instruments into a sandbox of endless possibilities. With Mass, you’ll find an extensive toolkit for creative control and experimentation. Here’s what you can expect: • Euclidean Pattern Sequencing: Easily create complex sequences by layering polyrhythmic Euclidian patterns. • Flexible MIDI CC: Modulate and sequence any MIDI CC parameter, allowing you to breathe life into every detail of your sound. • Physics-Based Animation: Apply physics to sequences and modulations, creating dynamic, evolving movements within your music. • Powerful Controller: Mass is a powerful MIDI controller, allowing you to manipulate your favorite hardware and software instruments in either standalone or AUv3 modes. • MIDI Sync: Synchronize with external hardware and software using standard MIDI sync capabilities. Mass can function as the primary clock, or be synced to a host clock. • iCloud Sync: Seamlessly share your creations across devices with iCloud syncing. Work in the standalone version or AUv3 plugin, without missing a beat. With Mass, you’re free to explore musical layers, rhythms, and motion in new ways. Let it guide your creative journey, transforming each idea into a boundless musical experience.

Screenshots

BounceBud Physics Based MIDI4 screens
Mass4 screens

Verdict

The call

The clearest difference is update cadence: BounceBud Physics Based MIDI at every 3 weeks against Mass's every 4 months. BounceBud Physics Based MIDI also leads on price ($5.99 vs $9.99) and iOS requirement (13.0 vs 17.0). On rating, review sentiment, ratings volume 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

CostPrice · In-app purchases · Ads · Monetization

BounceBud Physics Based MIDI costs $5.99 and Mass $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for BounceBud Physics Based MIDI against 5.0 for Mass. Both are backed by a comparable volume of ratings — 11 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

BounceBud Physics Based MIDI ships an update every 3 weeks, Mass every 4 months. Both last shipped on October 15, 2026.

Scorecard3 real differences · 7 level
BounceBud Physics Based MIDI versus Mass: the parameters behind the verdict, then further details
ParameterBounceBud Physics Based MIDIMass
Price$5.99 — better$9.99
Rating5.0 (11 ratings)5.0 (11 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1111
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size6 MB10 MB
Age rating4+4+
DeveloperCem OlcayUsable Creations

Customer experience

BounceBud Physics Based MIDI

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Mass

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

BounceBud Physics Based MIDI

No in-app purchases

None

Mass

No in-app purchases

Questions

Is BounceBud Physics Based MIDI free?
BounceBud Physics Based MIDI costs $5.99, with no in-app purchases.
Is Mass free?
Mass costs $9.99, with no in-app purchases.
Which has better reviews, BounceBud Physics Based MIDI or Mass?
BounceBud Physics Based MIDI and Mass are both rated 5.0 out of 5 on the App Store, from 11 and 11 ratings respectively.
Do BounceBud Physics Based MIDI or Mass have ads?
Neither BounceBud Physics Based MIDI nor Mass shows ads.
Which is updated more often, BounceBud Physics Based MIDI or Mass?
BounceBud Physics Based MIDI ships an update every 3 weeks, and Mass every 4 months. Most recently, BounceBud Physics Based MIDI was updated on October 15, 2026 and Mass on October 15, 2026.

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