# E3 Controller vs QRSFinder

The clearest difference is review sentiment: E3 Controller at 57% against QRSFinder's 21%. QRSFinder's advantage is update cadence (every 6 weeks vs every 11 months). 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.

E3 Controller ships an update every 11 months, QRSFinder every 6 weeks. The most recent releases landed on September 21, 2026 and July 30, 2026 respectively.

## The numbers

| Metric | E3 Controller | QRSFinder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (9 ratings)](https://appshunter.io/ios/app/e3-controller-us/id509030474/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **57.1% of reviews** | 21.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 12 MB | 64 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Yamaha Corporation of America](https://appshunter.io/developer/408058585) | [QRS Music](https://appshunter.io/developer/1034510122) |

## 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


### QRSFinder

[App page](https://appshunter.io/ios/app/qrsfinder/id1034510123)

Easily locate QRS PNOmation systems on your network. Connect directly to a single PNO environment or view a list of all network systems by serial number. Tap a serial number to launch the web app.

**Highlights:** Network QRS PNOmation system discovery, Stand Alone and Network mode support, List systems by serial number, Direct web app launch via serial number, Single PNO environment connection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E3 Controller free?

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

### Is QRSFinder free?

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

### Do E3 Controller or QRSFinder have ads?

Neither E3 Controller nor QRSFinder shows ads.

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

E3 Controller ships an update every 11 months, and QRSFinder every 6 weeks. Most recently, E3 Controller was updated on September 21, 2026 and QRSFinder on July 30, 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.*