Systems, methods, and other embodiments associated with enabling client-side enforcement of custom rules when the client is in offline mode include: creating a custom rule for enforcement on a mobile application client on a mobile application server; defining characteristics of user accounts for which the mobile application client is to enforce the custom rule; in response to a connection being established between an instance of the mobile application client for a specific user account and the mobile application server, determining that the instance of the mobile application client should enforce the custom rule based at least in part on a match between characteristics of the specific user account and the defined characteristics; and transmitting the custom rule to the instance of the mobile application client to enable the instance to enforce the custom rule when the instance is operating in the offline mode.