Use APKPure App
Get Remote For Dish Network old version APK for Android
Infrared version of remote control for Dish Network
Remote Control For Dish Network
This app only works if your phone has Infrared sensor (IR blaster).
Also your receiver has to have IR built it.
*Newer phones usually don't support IR so don't get your hopes up.
Disclaimer: This app is not the official Dish network app.