I like the i can use my phone to listen to roku using the roku app. But i found that it works for my roku 4 but not roku 3. Is this a known issue?
I believe the Roku 3 doesn't support private listening. We'll have to get @RokuDanny-R or @RokuTannerD to confirm.
As @atc98092 noted, mobile private listening is not supported on some models of the Roku 3.
As you previously observed, you would see the headphones icon on the remote tab of the mobile app if this feature was supported.
Thanks,
Tanner
Pretty sure that Rokus dev team could add this IF they wanted to for the Roku 3, but they never will. They'd rather upsell than support.