OttOrgan vs Suiin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OttOrgan
This application allows users to play a specific house organ sample set using a MIDI keyboard and pedal on iOS or macOS devices. It provides access to a unique five-rank manual and attached pedal with a 16' subbass.
- Play Ott-Orgel sample set
- Connect MIDI keyboard
- Connect MIDI pedal
- iOS and macOS support
- House organ simulation
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OttOrgan lets you play the Ott-Orgel sample set of Christian Datzko on a MIDI keyboard and a MIDI pedal attached to your iOS or macOS device. The Ott organ is a house organ with five ranks at one manual and an attached pedal with a 16' subbass. If you would like to use the sample set with other software, you can get it at http://orgel.datzko.ch/main.EN.html. For more information, please consult the app support page http://polaron.de/OttOrgan/ , the Napo documentation at http://polaron.de/Napo/ and in particular the Napo user manual at http://polaron.de/Napo/manual . For hearing sound examples of the app, please visit the support page http://polaron.de/OttOrgan/ .
Suiin
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Intelligent Guided Learning Visual Sliding Note Guidance: Notes gracefully descend from the top of the screen, precisely indicating when and which keys to press - guides you hand-in-hand through each piece Real-time Feedback System: Instant hit/miss indicators help you quickly correct mistakes Practice/Exam Dual Modes: Free learning in practice mode, authentic assessment in exam mode Professional Piano Experience 88-key Full-size Virtual Keyboard: Complete simulation of real piano keyboard layout High-quality Sound Sampling: Professional-grade piano sound library for immersive auditory experience Full MIDI Device Compatibility: Connect your MIDI keyboard for authentic keybed feel Extensive Music Library Real-time Library Updates: Regular addition of new pieces keeps learning content fresh Offline Availability: Download once and play anytime, anywhere without internet Alternative marketing-focused version: Smart Guided Learning • Visual sliding notes show exactly when to play each key • Real-time feedback helps you improve instantly • Practice freely or test your skills in exam mode Professional Piano Experience • 88-key virtual keyboard with authentic layout • Studio-quality piano sounds • Plug-and-play MIDI keyboard support Vast Music Collection • Regular new song additions • Play offline anywhere, anytime
Screenshots
Verdict
The clearest difference is price: Suiin at Free against OttOrgan's $9.00. Suiin also leads on update cadence (every 5 weeks vs every 5 months). OttOrgan's advantage is device support (4 vs 2) and iOS requirement (12.5.6 vs 17.6). On ads and in-app purchases 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
Suiin is free to download; OttOrgan costs $9.00 up front. Neither carries in-app purchases, so what you see is what you pay.
OttOrgan ships an update every 5 months, Suiin every 5 weeks. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.
| Parameter | OttOrgan | Suiin |
|---|---|---|
| Price | $9.00 | Free — better |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 12.5.6 — better | 17.6 |
| Further details — not scored | ||
| Size | 340 MB | 138 MB |
| Age rating | 4+ | 4+ |
| Developer | Markus Sigg | 要华 张 |
In-app purchases
OttOrgan
No in-app purchases
Suiin
No in-app purchases
