Box Remote

On this Android phone

It opens the Play Store. Install, then open Box Remote Buddy, tap your box, and type the 4-digit code the TV shows.

On this iPhone

Apple's TestFlight app installs it; if the phone asks about the local network, tap Allow. Or use the browser remote below.

Look at your own box's setup screen on the TV. It shows an address made of numbers ending in :8484/. Every box has a different one.
Type that exact address in Safari. The remote appears, and its top line names the box it reached. If that is not your box, do not enter a code.
Tap the share button, then Add to Home Screen, so it opens like an app.

The first button you press asks for the 4-digit code the TV shows. This is the same remote in the browser.

On the TV box, once

On the box, open the Play Store, search for Box Remote Agent and press Install. Then skip to the last step.

Box's Play Store doesn't find it? Do this part from a computer, in a browser signed in to the Google account your box's Play Store uses. On an Android phone these links open the Play Store app, which can only install onto phones.

Open the box app's Play Store page and press the green button. It says Install or Install on more devices.
A window opens with Choose a device. It starts on whatever Google picked, often a phone. Click the small arrows at its right end and pick your box. It may show under a maker's name you don't expect, such as "Google Elite". Then press Install.
Google may first ask you to verify it's you. Do that, then press Install again.
On the TV, the app arrives within about a minute. Nothing after a minute? Open the Play Store on the box once, then look again.
Open Box Remote Agent on the box and follow the steps it shows until it says your phone can control this box. That screen also shows a square code: point a phone's camera at it and it lands on this page with your box already filled in.

On a phone

Open this page on the phone you want to use as the remote. Android phones get the Play Store buttons; iPhones get the browser remote.

No Play Store on the box, or in a hurry? The direct download

Had the earlier test build on the box or phone? Uninstall it first. The Play Store version cannot install over it.

On the box, open the green Market tile and install Downloader.
Open Downloader and type this in its address box, then Go, Install, Open:

tinyurl.com/2b6k4yna

Follow the steps the TV shows until it says your phone can control this box.

Android 13 or 14 box and the accessibility switch keeps turning itself off? Settings, Apps, Box Remote Agent, the three-dot menu, "Allow restricted settings", then try again. Play Store installs are never blocked, which is why the Play route above is the main one.

Android phone without Play access: download the phone app directly. The phone will warn that it has not seen this developer before; "Install anyway" is under More details.