Does i need to pay for all my devices?

Hello
If I purchase the plex Android app. Can i use all the features in all my devices. All my devices had a different Google play store account. Or do I need to buy the same app on all my devices ?
Thanks for tour help!

You pay per App Store account.
If all your devices use a different account, then you’ll have to pay for every device separately.

Or bring some of your devices into the same app store account, if possible.