Comparison

E3 Controller vs YDIS Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

YDIS Smart

This application allows authorized Yamaha dealers to access diagnostic functions for Yamaha outboard motors on their smartphones. It requires a dedicated adapter and registration information for the PC version of the diagnostic system.

Highlights
  • Perform inspections of Yamaha outboard motors
  • Access self-diagnostic system functions
  • Use on smartphones
  • Requires dedicated adapter
  • Requires YDIS PC version registration
  • Enable speedometer display with GPS
Features
Read full description

YDIS Smart is an application software specifically designed to help users perform inspections of Yamaha outboard motors. YDIS Smart is designed to enable users to use some of the functions of the self-diagnostic system for Yamaha Marine products, Yamaha Diagnostic System (YDIS PC version), on smartphones. YDIS Smart App (“App”) is permitted for use by Yamaha authorized dealers only, and may only be used by the Yamaha authorized dealer for the purpose of providing services to a customer’s Yamaha outboard motor.  If the party accessing or downloading this App is not a Yamaha authorized dealer, then such party is not authorized to use this App and should immediately discontinue usage and delete the App. >How to Use YDIS Smart For details on the operation of YDIS Smart, see the instruction manuals issued by Yamaha Motor Co., Ltd. >Terms and Conditions for Use Please read and understand these precautions before using this application. YDIS Smart is intended for use exclusively by service staff who perform services and maintenance of Yamaha outboard motors. ・To use YDIS Smart, a dedicated adapter and the registration information for the main software (YDIS PC version) will be required. ・To enable the speedometer display, you need to turn on the GPS function on your smartphone. ・Internet connection via mobile data communication or wireless LAN is required during the user registration process and while using the application. ・To use YDIS Smart, you need to turn on the Bluetooth® function on your smartphone. ・Bluetooth® is a registered trademark of Bluetooth SIG, Inc. ・Do not manipulate this application while the boat is in motion. Otherwise, a collision could result. Yamaha shall not be liable for any direct or indirect damages, harm, or losses resulting from any accidents occurred during use of this application. ・When you use this application, Yamaha Motor Co., Ltd. will automatically collect the following information: Following information entered for user registration -YDIS Smart adapter serial number, Country ID, Shop ID, Installation Key Some of the following engine information collected by the application -Saved data, Country ID, Shop ID, location information (only when GPS is ON) * Logging data will not be collected automatically. We will use collected information to statistically analyze the usage of this application and to improve our services. Communication charges incurred to use this application shall be borne by the user. For other precautions and disclaimers, see the related instruction manuals.

Screenshots

E3 Controller2 screens
YDIS Smart1 screens

Verdict

The call

The clearest difference is rating: YDIS Smart at 3.7 against E3 Controller's 2.9. YDIS Smart also leads on update cadence (every 3 months vs every 11 months). E3 Controller's advantage is review sentiment (57% vs 43%). On price, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

YDIS Smart holds the better App Store score, 3.7 against 2.9. Both are backed by a comparable volume of ratings — 9 and 16 respectively. Written reviews complicate that: 57% of E3 Controller's written reviews are positive against 43% of YDIS Smart's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

E3 Controller ships an update every 11 months, YDIS Smart every 3 months. The most recent releases landed on September 21, 2026 and September 16, 2026 respectively.

Scorecard3 real differences · 7 level
E3 Controller versus YDIS Smart: the parameters behind the verdict, then further details
ParameterE3 ControllerYDIS Smart
PriceFreeFree
Rating2.9 (9 ratings)3.7 (16 ratings) — better
Positive reviews57.1% of reviews — better42.9% of reviews
Number of ratings916 — better
Update frequencyEvery 11 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.012.0
Further details — not scored
Size12 MB7 MB
Age rating4+17+
DeveloperYamaha Corporation of AmericaYamaha Motor Co., Ltd.

Customer experience

E3 Controller

All ratings9 ratings
Positive44.4%
Neutral11.1%
Negative44.4%
Written reviews7 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

YDIS Smart

All ratings16 ratings
Positive62.5%
Neutral6.3%
Negative31.3%
Written reviews7 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

In-app purchases

None

E3 Controller

No in-app purchases

None

YDIS Smart

No in-app purchases

Questions

Is E3 Controller free?
E3 Controller is free to download, with no in-app purchases.
Is YDIS Smart free?
YDIS Smart is free to download, with no in-app purchases.
Which has better reviews, E3 Controller or YDIS Smart?
YDIS Smart is rated higher. E3 Controller averages 2.9 out of 5 from 9 ratings, while YDIS Smart averages 3.7 from 16 ratings.
Do E3 Controller or YDIS Smart have ads?
Neither E3 Controller nor YDIS Smart shows ads.
Which is updated more often, E3 Controller or YDIS Smart?
E3 Controller ships an update every 11 months, and YDIS Smart every 3 months. Most recently, E3 Controller was updated on September 21, 2026 and YDIS Smart on September 16, 2026.

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