# E3 Controller vs Crowdkeep

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.

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.

## The numbers

| Metric | E3 Controller | Crowdkeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.9 (9 ratings)](https://appshunter.io/ios/app/e3-controller-us/id509030474/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/crowdkeep/id6450303559/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 12 MB | 146 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yamaha Corporation of America](https://appshunter.io/developer/408058585) | [Crowdkeep LLC](https://appshunter.io/developer/1675022952) |

## What reviewers say

### E3 Controller

[App page](https://appshunter.io/ios/app/e3-controller-us/id509030474)

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.

**Highlights:** Remote control for Disklavier E3/DKC-850, Access all infrared remote functions, View piano control unit screen, Check song titles remotely, Wireless router connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


### Crowdkeep

[App page](https://appshunter.io/ios/app/crowdkeep/id6450303559)

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.

**Highlights:** Real-time georeferenced view, Device and people tracking, Rule-triggered notifications, AI and analytics capabilities, Behavioral analysis, Platform behavior configuration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is E3 Controller free?

E3 Controller is free to download, with no in-app purchases.

### Is Crowdkeep free?

Crowdkeep is free to download, with no in-app purchases.

### Which has better reviews, E3 Controller or Crowdkeep?

Crowdkeep is rated higher. E3 Controller averages 2.9 out of 5 from 9 ratings, while Crowdkeep averages 5.0 from 1 ratings.

### Do E3 Controller or Crowdkeep have ads?

Neither E3 Controller nor Crowdkeep shows ads.

### Which is updated more often, E3 Controller or Crowdkeep?

E3 Controller ships an update every 11 months, and Crowdkeep every 2 weeks. Most recently, E3 Controller was updated on September 21, 2026 and Crowdkeep on July 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*