My advice is get the hikvision if you don’t like it send it back and then go into the joys of trialling different cameras
Just a thought the reolink app won’t work as a remote door bell app for a third party camera . You’ll need the original app for that to answer on your phone
But no two way chat that the product app would give you
I’m a bit lost now as you seem to be wanting to combine two incompatible products for no reason and lose functionally
FYI, Eufy is no cloud based for recording, they make a big point of it. They have recording in their base station which I believe also handle notification and authentication so in theory should work even if your internet is down as long as the base station and phone are both on the same network.Very few doorbells that rely solely on a cloud service, Eufy, Ring, Nest etc will not be ONVIF compliant, they have no need to be as they dont want people using them outside of their ecosystem paywall.
Companies that will be ONVIF compliant will be Hikvision and Doorbird. Funnily enough they are two of the few companies who sell POE Doorbells. If you flash the EZViz DB1 to Hik firmware it too is is ONVIF compliant.
Doorbird are mainly metal bodied. The D101S is polycarbonate.
Ring Elite is POE but again not ONVIF and its a PIA to install.
Are you sure you are looking at the right pricing for Eufy ?My point was its an ecosysytem based platform that does not provide ONVIF or RTSP streams to third parties. You can split hairs on where it stores its data but it does not meet the OPs brief. Its also significantly more expensive than the EZViz DB1 and DB1C which both provide RTSP Streams, can work with NVRs.
Or you could look at Amazon product
Which actually meets all of the specs, works with a NVR, has an indoor station and is POE. And is about £20 more than the Eufy.