E3 Controller vs Crowdkeep
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E3 Controller
Control your Disklavier E3 or DKC-850 remotely from your iOS device. View song titles and access all functions previously available with the infrared remote. Requires a wireless router connection to your piano.
- Remote control for Disklavier E3/DKC-850
- Access all infrared remote functions
- View piano control unit screen
- Check song titles remotely
- Wireless router connectivity
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E3 Controller is an application designed to enable remote control of a Disklavier E3 or DKC-850. All functions that were possible with the infrared remote control (that was included with the Disklavier E3 or DKC-850) have been made available on iOS devices (iPhone/iPod touch/iPad). Moreover, the E3 Controller displays the screen of the control unit of Disklavier, so you don't have to physically go to the piano to confirm, for example, a song title. All that's required is your ability to access the wireless router that is connected to your Disklavier. Requirements: - Disklavier E3 Version 3.20 or later, or DKC-850 Version 3.20 or later - Wireless router Usage note: * Connect Disklavier to the wireless router by LAN cable and choose that same network in the Wi-Fi setting of iPhone/iPod touch/iPad. * If the wireless router has several local networks, confirm that the Disklavier and the iOS device are connected to the same LAN. For more detail, refer to the manual that came with your wireless router. User's Guide: You can access the E3 Controller User's Guide by tapping the "triangle" button in the lower-right corner of the display.
Crowdkeep
This app provides a real-time, georeferenced view of people and devices. It offers advanced AI and analytics to notify users when specific rules are triggered and allows for configuration of platform behaviors based on user actions or predefined rules.
- Real-time georeferenced view
- Device and people tracking
- Rule-triggered notifications
- AI and analytics capabilities
- Behavioral analysis
- Platform behavior configuration
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This mobile App allows a user to have a real time georeferenced view of people/devices, get notified when a rule is triggered and/or admin and configure behaviours on the platform. With advanced AI and analytics capabilities, this app allows a user to have a better control and take actions based on behaviours or previous defined rules.
Screenshots
Verdict
The clearest difference is rating: Crowdkeep at 5.0 against E3 Controller's 2.9. Crowdkeep also leads on update cadence (every 2 weeks vs every 11 months). E3 Controller's advantage is ratings volume (9 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Crowdkeep holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: E3 Controller has 9 ratings behind it against 1, so its average is the more settled of the two.
E3 Controller ships an update every 11 months, Crowdkeep every 2 weeks. The most recent releases landed on September 21, 2026 and July 19, 2026 respectively.
| Parameter | E3 Controller | Crowdkeep |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 12 MB | 146 MB |
| Age rating | 4+ | 4+ |
| Developer | Yamaha Corporation of America | Crowdkeep LLC |
Customer experience
E3 Controller
Crowdkeep
In-app purchases
E3 Controller
No in-app purchases
Crowdkeep
No in-app purchases
Questions
Is E3 Controller free?
Is Crowdkeep free?
Which has better reviews, E3 Controller or Crowdkeep?
Do E3 Controller or Crowdkeep have ads?
Which is updated more often, E3 Controller or Crowdkeep?
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