Pocket Organ C3B3 vs MarcMoerd
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pocket Organ C3B3
This app simulates a Hammond Organ with realistic sound generation and a rotary speaker effect. It offers dual keyboards, customizable scales, and various effects like overdrive and reverb. Users can save custom settings and explore factory presets for different genres.
- Virtual Tonewheel System sound generation
- Rotary speaker effect (Fast, Slow, Off)
- Dual 5-octave keyboards
- Customizable keyboard scales
- Harmonic Percussion and Keyclick effects
- Overdrive and Reverb effects
- Accelerometer-controlled effects
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Pocket Organ C3B3 is a musical keyboard application for iPad/iPhone/iPod touch that simulates the Hammond Organ. The sound is generated with the synthesis of the waveforms from "Virtual Tonewheel System" controlled by 9 drawbars like the actual Hammond Organ. You will be surprised at the real sound generated from this App! Pocket Organ C3B3 is a Hammond Organ in your pocket or bag Pocket Organ C3B3 has a rotary speaker effect like the Leslie speaker, which adds amazing realistic character and spatial depth on your organ playing. This effect can be changed to Fast (Tremolo), Slow (Chorale), or even Off (brakes). Visit our website to listen to the realistic and authentic sound! Features: - Authentic emulated sounds generated from "Virtual Tonewheel System" mixed by sliding 9 drawbars - 61key + 61key, 5-octave Dual Keyboards with switchable key width - Scrollable Keyboard that can be configured to your own octave key range on screen with 4 preset buttons - Key transpose function (You can play a music of any key in the key of C) - You can select the Keyboard scale of normal, minor Pentatonic, major Pentatonic, minor Blues, major Blues - Rotary Speaker effect can be changed to Fast (Tremolo), Slow (Chorale), or even Off (brakes). - Harmonic Percussion effect with adjustable decay, 2nd and 3rd harmonic - Keyclick noise effect - Built-in Reverb that simulates spring reverb - Overdrive effects - Scanner vibrato & chorus - Shake your iPad/iPhone to play spring shock (reverb crash) effect like Jon Lord (keyboard player of Deep Purple) or Keith Emerson (a member of the Emerson, Lake & Palmer, ELP). - iPhone's built-in accelerometer gives you amazing glissando effect control. - 20 Factory Presets containing typical settings used by Rock, Jazz or Gospel Sounds - You can add the User Memory Bank that allows you to store your own 20 patches (drawbars & effects settings) & Preset Packages with In App Purchase. - Pocket Organ C3B3 is programmed by Shinya Kasatani, the creator of best selling iPhone App "PocketGuitar" and is designed by Junichiro Yamasaki of "Super Manetron".
MarcMoerd
This application provides access to a high-quality pipe organ sample set for use with MIDI keyboards and pedals on iOS and macOS devices. It requires a significant download size, so ensure ample storage space is available.
- Pipe organ sample set
- MIDI keyboard support
- MIDI pedal support
- iOS and macOS compatibility
- Large sample library
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This app makes the Marcussen/Moerdijk pipe organ sample set available for playing with MIDI keyboards and a MIDI pedal connected to your iOS or macOS device. The sample set of the organ of the former St. Stefanuskerk in Moerdijk, Netherlands, is used with the kind permission of Ariaan Hoogendijk. For more information about the app and the underlying Napo framework, please visit the support page http://polaron.de/MarcMoerd/ , the Napo documentation at http://polaron.de/Napo/ and in particular the user manual at http://polaron.de/Napo/manual . *** For your attention *** This app is a huge download of nearly 2 GB. Make sure there is enough free SSD space on your device.
Screenshots
Verdict
The clearest difference is price: MarcMoerd at Free against Pocket Organ C3B3's $0.99. MarcMoerd also leads on in-app purchases (none vs 7) and review sentiment (86% vs 65%). Pocket Organ C3B3's advantage is iOS requirement (7.0 vs 12.5.6). On rating, ratings volume, update cadence 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
MarcMoerd is free to download; Pocket Organ C3B3 costs $0.99 up front. Pocket Organ C3B3 sells 7 one-off in-app purchases. MarcMoerd asks for nothing beyond the download.
MarcMoerd holds the better App Store score, 4.3 against 4.1. Both are backed by a comparable volume of ratings — 14 and 6 respectively. Written reviews point the same way: 65% of Pocket Organ C3B3's written reviews are positive against 86% of MarcMoerd's.
Pocket Organ C3B3 ships an update every 4 months, MarcMoerd every 7 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.
| Parameter | Pocket Organ C3B3 | MarcMoerd |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.1 (14 ratings) | 4.3 (6 ratings) — better |
| Positive reviews | 64.6% of reviews | 85.7% of reviews — better |
| Number of ratings | 14 — better | 6 |
| Update frequency | Every 4 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 7.0 — better | 12.5.6 |
| Further details — not scored | ||
| Size | 31 MB | 1.8 GB |
| Age rating | 4+ | 4+ |
| Developer | insideout ltd. | Markus Sigg |
Customer experience
Pocket Organ C3B3
MarcMoerd
Bugs and requests
Pocket Organ C3B3
Reported bugs
16 issues- Duplicate notes on same keys (E/F, A/Ab/B)
- Notes stick and don't release properly
- Crashes when playing multiple notes simultaneously
- Audiobus initialization failure
- Inter-app audio compatibility issues
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- MIDI channel receives all channels instead of specific ones
- Preset packs fail to load correctly
- App stops functioning when another app is opened
- Swell pedal doesn't work with external keyboards
- iRig Keys PRO register/octave repetition issue
- iOS 8+ compatibility problems
- App crashes on iPad 2 and older devices
- Four-finger swipe gesture causes keyboard malfunction
- Latency issues when playing multiple keys
- Reverb crash volume too loud and non-adjustable
- App goes to sleep while playing via MIDI
Requested features
18 requests- Adjustable Leslie speed control (slow/fast customization)
- Expression/sustain pedal MIDI support
- Bluetooth pedal control for Leslie speed switching
- Background audio playback when app is minimized
- Audiobus and inter-app audio support
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- Swell pedal MIDI control
- Configurable MIDI channel selection per manual
- Recording and playback functionality
- Retina display support
- Resizable keyboard with adjustable key width
- Screen rotation support
- Full Leslie bypass option
- Tonewheel leakage control for authentic 60s sounds
- Separate percussion control for upper/lower manuals
- MIDI data transmission (not just receive)
- Mod wheel and pitch wheel assignments
- Hide on-screen keyboards for MIDI-only use
- Unified control view (drawbars, percussion, vibrato together)
MarcMoerd
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Pocket Organ C3B3
- User Memory Bank$0.99
- Progressive Rock Pack$0.99
- Hard Rock Pack$0.99
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- Super Rock Selection$0.99
- Great Rock Selection$0.99
- Reggae & Psychedelic Pack$0.99
- Jazz & Gospel Pack$0.99
MarcMoerd
No in-app purchases









