An app log is generally meant a list consisting of application info, system performance, and user activities in this service. A VPN log, in turn, includes all the information that is transferred through the network. As a result, a no-log (also called zero-log) VPN implies that a VPN application doesn’t collect any private data or online activity of its users.
A no-log VPN policy stands for the absolute anonymity of users and not saving any of their private details and online-activity data. By choosing a VPN app with such a policy, you ensure that no one (including your no-log VPN provider) encroaches on your online privacy.