A security camera mobile app lets authorized users view live and recorded video, receive alerts and change some settings from a phone. Its value depends on encrypted transport, individual user accounts and clear notification rules rather than on how many features a store listing advertises.
An app extends the system to wherever staff happen to be. That convenience also creates a copy of the interface outside the building, on devices the organization may not manage.
Access beyond the login
Each user should have an account, multi-factor login and permissions that match on-site roles. A shared account removes accountability for who watched what, and when they watched it.
Notifications and privacy
Alert rules that fire on every motion train people to ignore them. Video previews on a lock screen and third-party push services also move footage off site, which a privacy policy should address.