Comparison

Heavy Brass vs KeyStage

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

Head to head
About

Heavy Brass

This virtual instrument app provides realistic trumpet, trombone, and saxophone sounds for music production and live performance. It offers a wide variety of articulations and sound categories, supporting integration with other music apps and external MIDI controllers.

Highlights
  • Trumpet, Trombone, Saxophone sounds
  • Multiple brass section samples
  • Switchable and crossfadeable articulations
  • Audio Unit v3, Inter-App Audio, Audiobus support
  • External MIDI keyboard and controller support
  • Integrated effects with presets
  • MIDI player and recorder
Read full description

Heavy Brass delivers the most flexible and innovative approach to modern brass sounds ever provided by a virtual MIDI instrument!¹ With this ultimate brass app your productions and live performances will gain such powerful and amazing tone you previously were only able to retrieve from a real brass section! This app contains the following instruments: Trumpet, Trombone and Saxophone sampled in four different brass sections. Watch and listen to the demo video on our product website! Minimum requirement: at least iPad 3 / iPad Air 1 / iPad mini 2. This app supports Audio Unit v3, Inter-App Audio and Audiobus, so you can directly use it with other apps as well! External MIDI keyboards and controllers are supported as well of course, both via Lightning/USB cable connection, as well as wireless via Bluetooth LE MIDI.¹ There are 3 fundamental sound categories: „Singles“, „Switches“ and „Combis“, where „Switch Sounds“ allow you to either switch or crossfade between configurable articulations. Some „Combi Sounds“ allow you to switch or crossfade between predefined articulations as well. 24 Single Sounds: Solo Trumpet, Solo Sax, Solo Trombone, Heavy Brass 1-4, Section 1, Section 2, Section 3, Section 4, Crescendo, Growl, Doiks, Shaker 1, Shaker 2, Staccato 1, Staccato 2, Staccato Sax 1, Staccato Sax 2, Falls 1, Falls 2, Falls 3, Falls 4. Switch Sounds: Five base sounds: Section 1, Section 2, Section 3, Section 4 and Crescendo, which are switchable or crossfadeable to four alternative articulations: Shaker, Growl, Doiks or Falls. 16 Combi Sounds: Sections Velocity Layer 1, Sections Velocity Layer 2, Sections Velocity Layer 3, Sections Velocity Layer 4, Sections Velocity Layer 5, Sections Velocity Layer 6, Sections Modwheel Layer 1, Sections Modwheel Layer 2, Staccato Layer 1, Staccato Layer 2, Staccato Round Robin 1, Staccato Round Robin 2, Staccato Round Robin 3, Sections & Staccato Round Robin 1, Sections & Staccato Round Robin 2, Sections & Staccato Round Robin 3. General Features: • Low latency disk streaming. • Polyphony up to several hundred stereo voices.² • Configurable audio latency down to 1 ms. • Integrated effects with 18 presets. • App States: Save app's entire state as user presets. • 16 parts. • Provides Audio Unit v3 plugin version of this app, which allows it to be used as virtual instrument directly within third-party multi-track DAW apps. • Support for Apple's "Inter-App Audio" system. • Audiobus support. • MIDI velocity response curve editor. • Master Tune & Scale Tuning. • App can keep running in the background, so you can play on your keyboard while e.g. using Safari or another app to display scores or surfing the Internet. • Virtual on-screen piano keyboard with velocity support, scalable & scrollable. MIDI Player / Recorder: • Record, save and load your songs in standard MIDI file format. • Share your songs easily as audio file. • Unlimited amount of tracks. • Configurable target MIDI channel per track. • Unlimited recording and playback length. • Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail). • Download or upload MIDI files with iTunes. • Load your favorite songs as MIDI files from the Internet, and watch at the virtual keyboard how to play it. • Metronome. • Use the "Tempo Zoom" dial knob to i.e. slow down playback at any time and learn your favorite songs more easily. ¹ For more information about adapters and connecting external MIDI keyboards: https://doc.crudebyte.com/iOS/External_MIDI_devices/ ² Various sounds are using several voices per note. Polyphony depends on the exact device model being used. You find a polyphony table on our product website. Anti-Spy Commitment: We take your privacy very seriously. None of our apps contain so called „spy” behaviors and we committed ourself to a very high privacy standard. For more information read our „Privacy Policy for Mobile Apps”.

About

KeyStage

This app acts as a master controller, AUv3 host, and audio mixer for keyboard players. It allows simultaneous control of multiple hardware and software instruments via MIDI, with advanced mapping, scripting, and audio mixing capabilities.

Highlights
  • Connect multiple MIDI controllers to instruments
  • Load AUv3 instruments, effects, and MIDI processors
  • Create complex keyboard splits and layers
  • Advanced MIDI mapping and scripting
  • Audio mixer with volume and pan control
  • Play and automate audio files
  • View PDF and JPG files
Read full description

TRY THE FREE LITE VERSION: https://apps.apple.com/us/app/keystage-lite/id1437899019 KeyStage is a master controller, AUv3 host, and audio mixer app designed mainly for keyboard players. With KeyStage, you can simultaneously control any number of hardware and software instruments using any number of MIDI controllers in an organized way. Each project consists of sections (which corresponds to sections of a song). In each section you can change sounds and sound parameters of connected instruments, create complex splits and layers of your keyboard(s), change the functionalities of sliders/knobs/pedals of your MIDI controllers by creating advanced MIDI mappings, write your own scripts, view PDF and JPG files (e.g. sheet music) and lyrics, and much more. LIST OF FEATURES • Connect any number of MIDI controller to any number of MIDI instruments by creating tracks. • Load AUv3 instruments, effects, and MIDI Processors. • Assign any region of your keyboard(s) to any connected instrument. • Change velocity curve and velocity limits, and create velocity splits and layers. • Transpose notes and restrict notes to any key using pitch shifter. • Create mixer units to combine audio signals, turning KeyStage into an audio mixer. • With the player units, you can play wav, mp3, and m4a files, add marker points, automate actions (like play, stop, move to a marker etc.) using custom translators, or trigger certain events (like changing sections) when the player reaches a certain marker. • Input units allows you to use the microphone input, or the hardware inputs of a connected audio interface. • The Main Mixer view allows you to control volume levels and pans of all tracks, connect effect units, and connect units to mixer units. • Create instrument presets to easily change sounds of instruments by choosing patch names from patch lists. • KeyStage can also import Cubase Patch Scripts to automatically create instrument presets for your MIDI instruments. • KeyStage automatically detects new MIDI connections and recommends matching instrument presets from a database. • Simulate auto-sustain on any connected instrument. • KeyStage has a multi-track recorder, which lets you record any number of tracks simultaneously. • Change or filter any MIDI signal using custom translators. Use “Relative Control” switch to smoothly change the parameters of your instruments without any jumps. • Use XY control unit to send control change and pitch bend messages to any connected MIDI instrument. • Create setlists, quick access all the songs in a setlist from a setlist bar, move to previous/next songs from live console or using external MIDI. • Create virtual MIDI inputs/outputs for KeyStage. • Use virtual MIDI piano controller to play connected instruments. • View PDF and JPG files. Link any page or region of any file to any section. • Backup and restore your songs and global properties to Dropbox. • Map special actions (like changing octaves, switching sections, changing pages of a PDF file) to notes and controllers using custom translators. • You can write your own scripts in custom translators, which opens up endless possibilities. • Use MPE routing to control any MIDI instrument using MPE controllers like Seaboard. Use custom translators to change the functionalities of each MPE dimension. • KeyStage supports smooth transitions between sections. Pressed notes will continue to sound when you switch sections. You can access demo videos and video tutorials on my Youtube channel.

Verdict

The call

The clearest difference is price: Heavy Brass at $9.99 against KeyStage's $29.99. Heavy Brass also leads on in-app purchases (none vs 7). KeyStage's advantage is rating (4.7 vs 4.2) and review sentiment (91% vs 81%). On ratings volume, update cadence, 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

Heavy Brass costs $9.99 and KeyStage $29.99 up front. KeyStage sells 7 one-off in-app purchases. Heavy Brass asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KeyStage holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 37 and 37 respectively. Written reviews point the same way: 81% of Heavy Brass's written reviews are positive against 91% of KeyStage's.

UpkeepUpdate frequency

Heavy Brass ships an update every 2 months, KeyStage every 3 months. The most recent releases landed on June 11, 2026 and September 18, 2026 respectively.

Scorecard5 real differences · 5 level
Heavy Brass versus KeyStage: the parameters behind the verdict, then further details
ParameterHeavy BrassKeyStage
Price$9.99 — better$29.99
Rating4.2 (37 ratings)4.7 (37 ratings) — better
Positive reviews81.3% of reviews91.0% of reviews — better
Number of ratings3737
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPadiPad
Requires iOS12.0 — better13.0
Further details — not scored
Size353 MB61 MB
Age rating4+4+
DeveloperChristian Schoenebeck d/b/a CrudebyteAli Gokturk

Customer experience

Heavy Brass

All ratings37 ratings
Positive83.8%
Neutral0.0%
Negative16.2%
Written reviews32 reviews
Positive81.3%
Neutral3.1%
Negative15.6%

KeyStage

All ratings37 ratings
Positive91.9%
Neutral2.7%
Negative5.4%
Written reviews67 reviews
Positive91.0%
Neutral3.0%
Negative6.0%

In-app purchases

None

Heavy Brass

No in-app purchases

7 purchases

KeyStage

One-time7
  • Instrument UnitsFree
  • Effect UnitsFree
  • Player, Input, and Mixer UnitsFree
Show 4 more
  • MIDI UnitsFree
  • Small Tip$0.99
  • Medium Tip$3.99
  • Large Tip$9.99

Questions

Is Heavy Brass free?
Heavy Brass costs $9.99, with no in-app purchases.
Is KeyStage free?
KeyStage costs $29.99, and also offers in-app purchases.
Which has better reviews, Heavy Brass or KeyStage?
KeyStage is rated higher. Heavy Brass averages 4.2 out of 5 from 37 ratings, while KeyStage averages 4.7 from 37 ratings.
Do Heavy Brass or KeyStage have ads?
Neither Heavy Brass nor KeyStage shows ads.
Which is updated more often, Heavy Brass or KeyStage?
Heavy Brass ships an update every 2 months, and KeyStage every 3 months. Most recently, Heavy Brass was updated on June 11, 2026 and KeyStage on September 18, 2026.

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