Comparison

Keyborg Pro vs Colossus Piano

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

Head to head
About

Keyborg Pro

This app transforms any MIDI keyboard into a versatile instrument, offering modes for pedal steel guitar, 6-string guitar, and advanced chord playing. It caters to both beginners and experienced musicians with intuitive chord-based controls.

Highlights
  • Pedal steel guitar simulation
  • 6-string guitar simulation
  • Advanced chord playing
  • Multiple play modes
  • Intuitive chord-based controls
  • Built-in help and tips
Features
Read full description

The Keyborg Pro technology offers five modes of play, as follows. 1. E-Z Pedal Steel Keyborg: transforms any MIDI keyboard into a fully functional pedal steel guitar, but one that is played just like a standard piano keyboard using basic piano chords. Simple enough for novices, yet sophisticated enough for the most advanced players. 2. Pedal Steel Keyborg: transforms any MIDI keyboard into a fully functional pedal steel guitar, but one that is played with all the simplicity of a standard 6-string guitar using basic barre chords. Perfect for guitar players. 3. Barre Chord Keyborg: transforms any MIDI keyboard into a fully functional 6-string guitar using basic barre chords with up/down strumming of 1-6 adjacent strings. 4. Rob’s Barre Chord Keyborg: transforms any MIDI keyboard into a fully functional 6-string guitar using basic barre chords with up/down strumming of 1-6 adjacent strings, while using a single hand for both fretting and strumming/plucking. 5. E-Z Chord Keyborg: enables advanced chord playing on any MIDI keyboard using basic chord maneuvers. For more information on the Keyborg Pro app, be sure to check out its built-in Read Me, Help, and Tips. For video demonstrations of the Keyborg Pro technology, you can visit our KeyborgPro.com website.

About

Colossus Piano

Experience incredibly realistic piano sounds with a vast library of acoustic and electric piano models. This app offers advanced features like multi-velocity layers, pedal support, and MIDI integration for a professional playing experience.

Highlights
  • 13 high-quality piano models
  • 24 velocity layers per key
  • Sustain, Sostenuto, and Soft pedal support
  • MIDI integration (In/Out)
  • Audio Unit v3 and Inter-App Audio support
  • Low latency disk streaming
  • Adjustable tuning options
Features
Read full description

Colossus Piano sets a new standard in terms of realism, detail and overall quality of piano sounds on your iPad, iPhone and iPod touch. There are 8 acoustic piano models available as 8 individual in-app purchases, plus 5 E-Piano legends bundled as 1 sound set with this app, together those 13 piano models make up 30 Gigabyte of sound material. All keys of all piano models were recorded in full length with a recording quality of 24 bit and 96 kHz stereo. Note: this app requires in-app purchases to provide its functionalities! Minimum Requirement: at least iPad 3 / iPad Air 1 / iPad mini 2 / iPhone 5 / iPod touch 6th gen. Recommended: iPad Air 2 / iPad mini 4 / iPad Pro / iPhone SE / iPhone 6s or higher. The dark brown „Colossus Concert Grand” model:³ • 24 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 14 GB in size (SSD space). The white „Baby Grand” model: • 12 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 6 GB in size (SSD space). The „Upright Piano” model: • 8 velocity layers per key. • Dedicated sustain samples. • Release hammer sound. • Optional pad sound. • 3.4 GB in size (SSD space). The „E-Piano” sound set: • 5 legendary E-Piano models (plus different model generations or configurations). • 17 E-Piano sounds in total. • Optional pad sound. • Optional tremolo effect. • 1.6 GB in size (SSD space). For information about the other piano models, please visit our product website! This app supports Audio Unit v3, Inter-App Audio and Bluetooth LE MIDI ! Software features: • Modulation wheel support for controlling the most relevant sound parameter of the currently selected sound. • Warm pad sound of a well known analogue synthesizer (not available for all models) can be turned on/off as support for the piano sound; volume can be controlled by mod. wheel and expr. controller. • Sustain pedal support for holding notes. • Sostenuto pedal support for holding individual notes. • Soft pedal support for a more gentle sound. • Expression pedal support for controlling optional pad layer's volume. • Hammer sound when releasing keys, uses round robin, can be turned on/off and volume controlled (some acoustic pianos only). • Polyphony of up to several hundred stereo voices.² • Low latency disk streaming. • Configurable audio latency down to 1 ms. • Integrated effects (18 presets). • App States: Save app's entire state as user presets. • MIDI velocity response curve editor. • App can keep running in the background. • Master Tune, Scale Tuning & Hermode Tuning. • Provides Audio Unit v3 plugin version of this app, which allows it to be used as virtual instrument directly within 3rd party multi-track DAW apps. • Supports Apple's "Inter-App Audio" system. • 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. • 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. • Metronome. • Use the "Tempo Zoom" dial knob to i.e. slow down playback at any time, learn your favorite songs more easily. ¹ For more information about supported adapters and MIDI keyboards, please visit our product website. ² Some sounds might use several voices per note. Polyphony depends on the exact device model being used. You find a polyphony table on our product website. ³ Important: the dark brown „Colossus Grand” piano model requires a large amount of main memory, so we only recommend this piano model for device models mentioned as „recommended” above.

Screenshots

Keyborg Pro4 screens
Colossus Piano4 screens

Verdict

The call

The clearest difference is rating: Keyborg Pro at 5.0 against Colossus Piano's 3.3. Keyborg Pro also leads on in-app purchases (none vs 9) and update cadence (fortnightly vs every 2 months). Colossus Piano's advantage is ratings volume (65 vs 1). On price, ads, device support and iOS requirement 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

Both are free to download. Colossus Piano sells 9 one-off in-app purchases. Keyborg Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Keyborg Pro holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Colossus Piano has 65 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Keyborg Pro ships an update fortnightly, Colossus Piano every 2 months. The most recent releases landed on October 18, 2026 and October 22, 2026 respectively.

Scorecard5 real differences · 5 level
Keyborg Pro versus Colossus Piano: the parameters behind the verdict, then further details
ParameterKeyborg ProColossus Piano
PriceFreeFree
Rating5.0 (1 ratings) — better3.3 (65 ratings)
Positive reviews—54.5% of reviews
Number of ratings165 — better
Update frequencyFortnightly — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size775 MB384 MB
Age rating4+4+
DeveloperGARY POGODAChristian Schoenebeck d/b/a Crudebyte

Customer experience

Keyborg Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Colossus Piano

All ratings65 ratings
Positive50.8%
Neutral9.2%
Negative40.0%
Written reviews112 reviews
Positive54.5%
Neutral9.8%
Negative35.7%

Bugs and requests

Keyborg Pro

Not enough reviews yet to summarise bugs or requests.

Colossus Piano

Reported bugs

27 issues
  • Crashes when exporting to WAV/M4A in GarageBand
  • App crashes when switching piano models
  • Audio Unit extension crashes
  • No sound when exporting to GarageBand
  • Plugin crashes in DAWs during export/freeze
Show 22 more
  • App crashes when loading MIDI files
  • Hammer sound too loud even at lowest settings
  • Low C1 note out of tune
  • Electric Grand F4 note sample start time issue
  • Electric Grand G#4, D5 notes have noise on attack
  • Plugin not loading properly in hosts
  • AUv3 interface scaled back
  • Exporting to WAV results in silence
  • App crashes during export/freeze
  • Japanese Grand has low volume
  • Colossus Concert Grand needs improvement
  • G1 key has loud, annoying noise
  • B flat 3 key sounds too flat
  • Crashing in AU mode
  • Bass notes drop out when holding damper pedal
  • Voice stealing makes piano perform unacceptably
  • Bass is muddy in Concert Grand
  • Note 26 (Bb2) sounds like an upright
  • Subtle nuance playing is nearly impossible
  • App crashes or freezes randomly
  • MIDI player doesn't work with GarageBand
  • Audio Units extension terminates unexpectedly

Requested features

14 requests
  • Add chorus effect
  • Global EQ
  • Release control
  • Tap tempo for modulation speed
  • Save velocity curves
Show 9 more
  • More intuitive UI
  • Zoom function for keys
  • Add release samples
  • MIDI export/import
  • Three-band EQ
  • Layering sounds on multiple MIDI keyboards
  • Ability to save setups
  • Improve AUv3 functionality
  • Add more piano models

In-app purchases

None

Keyborg Pro

No in-app purchases

9 purchases

Colossus Piano

One-time9
  • Vintage Upright$9.99
  • Historic S Grand$9.99
  • Pianino$12.99
Show 6 more
  • Japanese Grand$12.99
  • Classic B Grand$15.99
  • Upright Piano$19.99
  • Colossus E-Piano Set$19.99
  • Baby Grand Piano$26.99
  • Colossus Concert Grand$49.99

Questions

Is Keyborg Pro free?
Keyborg Pro is free to download, with no in-app purchases.
Is Colossus Piano free?
Colossus Piano is free to download, with in-app purchases available.
Which has better reviews, Keyborg Pro or Colossus Piano?
Keyborg Pro is rated higher. Keyborg Pro averages 5.0 out of 5 from 1 ratings, while Colossus Piano averages 3.3 from 65 ratings.
Do Keyborg Pro or Colossus Piano have ads?
Neither Keyborg Pro nor Colossus Piano shows ads.
Which is updated more often, Keyborg Pro or Colossus Piano?
Keyborg Pro ships an update fortnightly, and Colossus Piano every 2 months. Most recently, Keyborg Pro was updated on October 18, 2026 and Colossus Piano on October 22, 2026.

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