You must own a Synology NAS or NVR to run this app, and be running the latest Surveillance Station 8.2 to get the complete set of features.

With Synology LiveCam, you can turn your mobile device into an IP camera and pair it with Surveillance Station. This not only allows you to view live streaming, recordings, and snapshots on both Surveillance Station and your mobile device, you can also download and store the files locally for saving and viewing.
From version Synology LiveCam 1.0.0:
This is the initial release of this app and requires Synology Surveillance Station package 8.2 or above to run.
All versions
October 12, 2018