Reolink NVR kits do not require apps, and you can configure them on no-internet vlans as well. There is a max number of cameras though. You could spin up your

Reolink NVR kits do not require apps, and you can configure them on no-internet vlans as well. There is a max number of cameras though. You could spin up your own ShinobiCCTV if NVRs are your problem.