E3 Controller vs Blue Tea
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.
Blue Tea
Easily share photos, videos, audio, and files of any format with friends without using mobile data. This cross-platform tool is always free and ad-free, allowing for convenient file transfers anytime, anywhere.
- Cross-platform sharing
- No mobile data required
- Share photos, videos, audio, and files
- Ad-free experience
- Always free to use
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Blue Tea is a cross platform sharing tool which requires no mobile data. Share the photos, videos, audios and files of any formats with your friends at any time on your phone. No Ads and Always free to use
Screenshots
Verdict
The clearest difference is review sentiment: Blue Tea at 100% against E3 Controller's 57%. Blue Tea also leads on rating (5.0 vs 2.9) and update cadence (monthly 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.
Blue Tea 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. Written reviews point the same way: 57% of E3 Controller's written reviews are positive against 100% of Blue Tea's.
E3 Controller ships an update every 11 months, Blue Tea monthly. The most recent releases landed on October 15, 2026 and October 10, 2026 respectively.
| Parameter | E3 Controller | Blue Tea |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 57.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 11 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 12.1 |
| Further details — not scored | ||
| Size | 12 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Yamaha Corporation of America | Kakas Group LTD |
Customer experience
E3 Controller
Blue Tea
In-app purchases
E3 Controller
No in-app purchases
Blue Tea
No in-app purchases
