Denon DRA-900H Quick Start Manual page 21

Download the mobile apps
Download both the "HEOS" app and the "Denon AVR Remote"
app for the full home entertainment experience. The HEOS app
is required to access online music through your stereo receiver.
HEOS app
The HEOS app allows you to explore, browse, and play music
from many online streaming services or from your own music
library.
Denon AVR Remote
Control your new stereo receiver with the latest Denon AVR
Remote app.
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