CMP Grand Piano vs Smart Scale Controller Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CMP Grand Piano
Experience a high-quality virtual grand piano with realistic sound and low latency. Connect an external MIDI keyboard for professional stage use or practice. Record and share your musical creations.
- Realistic grand piano sound with 1.7GB+ samples
- Bluetooth LE MIDI, Audio Unit, and Inter-App Audio support
- Connect external MIDI keyboards
- Low resource consumption for older devices
- MIDI player/recorder with export options
- Hermode Tuning for brilliant sound
- Configurable audio latency
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The second best sounding piano app in the App Store (after "Colossus Piano")! Convince yourself by watching and listening to the demo video on our product website! This app supports Bluetooth LE MIDI, as well as Audio Unit and Inter-App Audio! CMP Grand Piano is a high quality virtual piano sound module for your iPad, iPhone and iPod Touch. It is designed for professional usage on stage by connecting an external MIDI keyboard to the iPad / iPhone / iPod touch by using the Apple USB camera adapter or another adapter supported by Apple.¹ In comparison to "Colossus Piano" this app especially has a lower resource consumption and runs thus also on much older devices. CMP Grand Piano provides a very realistic sound by using a very large collection of audio samples of more than 1.7 GB (uncompressed) in size. Various articulations of each key of a real piano were sampled in full length and high quality to assemble this realistic sound. Real-time disk streaming is utilized to playback the respective audio samples with very low latency. Sound Features: - Two high quality base sounds ("Grand Piano" and "Jazz Piano") with more than 1.7 GB in size. - Two additional sounds available as in-app purchase ("Concert Grand" and "Upright Pianino") with additional 1.6 GB and 1.1 GB respectively in size. - Polyphony up to several hundred voices.² - Configurable audio latency down to 1ms. - Integrated effects with 17 presets. - MIDI velocity response curve editor to fine tune the feeling of your MIDI keyboard, save them as presets if you use more than one keyboard. - App can keep running in the background, so you can play piano while e.g. using Safari or another app to display scores or surfing the Internet. - Hermode Tuning: Makes the sound more brilliant by controlling the pitch of the notes in multivoiced music to better frequency ratios than with fixed tuning. This dynamic tuning imitates the tuning behavior of well educated musicians with string and wind instruments and of singers in professional choirs. - 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 (iOS 9.3 and higher). - Supports Apple's "Inter-App Audio" system for audio & MIDI streaming between other apps. - Supports "JACK Audio Connection Kit" for audio & MIDI streaming between other apps (up to iOS 6.1.3). MIDI Player / Recorder: - Record, save and load your songs in standard MIDI file format. - Export and share your song as MIDI file or as audio (.wav, .m4a) file. - Unlimited amount of tracks. - Unlimited recording and playback length. - Open MIDI (.mid) files directly from other apps (i.e. from Safari, Mail). - 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 supported adapters and MIDI keyboard devices, please visit our product website. ² Polyphony depends on the exact device model being used. You find a polyphony table on our product website. Privacy: 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 about our privacy commitment, read our „Privacy Policy for Mobile Apps”.
Smart Scale Controller Pro
Control keyboard scale and tuning in real-time. Offers seamless control over musical parameters for musicians, unlocking new creative possibilities. Perfect for live performances or studio sessions.
- Real-time scale tuning
- Transpose
- Pitch bend
- Preset management
- Bank select
- OTG and BLE connectivity
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Smart Scale Controller is a professional-grade mobile application designed specifically to control the scale and tuning of your keyboard in real-time. Tailored for musicians, this app offers seamless control over various musical parameters, helping you unlock new creative possibilities. Compatible Keyboards: - Korg (Pa Series, Triton Extreme/Classic/Studio, Trinity, Kronos, M3, Krome, Nautilus) - JuzziSound 1/2 - Yamaha (PSR, MODX, Tyros, Genos) - Kontakt (Native instrument) Supported Features: - Real-time Scale Tuning - Transpose - Pitch Bend - Preset Management - Bank Select - Connection Options: OTG Cable for direct connection BLE Yamaha for wireless Bluetooth connectivity With Scale Controller, you can effortlessly adjust your keyboard settings on the go, making it the perfect tool for live performances or studio sessions. Explore new tunings, experiment with presets, and achieve perfect harmony with ease.
Screenshots
Verdict
The clearest difference is price: CMP Grand Piano at $14.99 against Smart Scale Controller Pro's $99.99. CMP Grand Piano also leads on rating (4.2 vs 3.4) and review sentiment (78% vs 50%). Smart Scale Controller Pro's advantage is update cadence (every 3 weeks vs every 2 months). On ratings volume, ads, in-app purchases 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
CMP Grand Piano costs $14.99 and Smart Scale Controller Pro $99.99 up front. CMP Grand Piano sells 2 one-off in-app purchases and Smart Scale Controller Pro sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
CMP Grand Piano holds the better App Store score, 4.2 against 3.4. Both are backed by a comparable volume of ratings — 15 and 9 respectively. Written reviews point the same way: 78% of CMP Grand Piano's written reviews are positive against 50% of Smart Scale Controller Pro's.
CMP Grand Piano ships an update every 2 months, Smart Scale Controller Pro every 3 weeks. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.
| Parameter | CMP Grand Piano | Smart Scale Controller Pro |
|---|---|---|
| Price | $14.99 — better | $99.99 |
| Rating | 4.2 (15 ratings) — better | 3.4 (9 ratings) |
| Positive reviews | 78.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 15 — better | 9 |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 1.7 GB | 97 MB |
| Age rating | 4+ | 4+ |
| Developer | Christian Schoenebeck d/b/a Crudebyte | 9390-0801 Quebec inc |
Customer experience
CMP Grand Piano
Smart Scale Controller Pro
In-app purchases
CMP Grand Piano
- Upright Pianino$4.99
- Concert Grand Piano$8.99
Smart Scale Controller Pro
- Unlimited Virtual MIDI Devices$4.99
- Unlimited Preset Banks$4.99
- Plugin Mode — AUv3 Instruments$30.00
Questions
Is CMP Grand Piano free?
Is Smart Scale Controller Pro free?
Which has better reviews, CMP Grand Piano or Smart Scale Controller Pro?
Do CMP Grand Piano or Smart Scale Controller Pro have ads?
Which is updated more often, CMP Grand Piano or Smart Scale Controller Pro?
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