Data sync engine, method and software

A system, comprising:

• a core computing system;
• and
• a database communicatively coupled to the core computing system, the database comprising user data for a user, wherein the core computing system:
• maintains a list of a plurality of user devices for the user that are enabled for communicating with the core computer system to access the user data stored on the database;
• maintains lists of data changes made to the database of user data separately for each of the plurality of user devices, wherein a data change associated with at least one user device of the plurality of user devices is added to a list of data changes to be updated on different user devices of the plurality of user devices;
• prefilters the data changes for each of the plurality of user devices such that only preselected types of data changes are used to update the user data on the plurality of user devices;
• and
• in response to detecting a data change to the user data for at least one of the plurality of user devices, sends a real-time notification to other user devices of the plurality of user devices for the user of the data change to prompt data synchronization on the other user devices of the plurality of user devices.

An apparatus, comprising:

• means for maintaining a list of user devices for a user that are enabled for communicating with a core computer system, the core computer system storing a database of user data for the user;
• means for maintaining lists of data changes made to the database of user data separately for each of the user devices, wherein a data change associated with one user device is added to a list of data changes to be updated on a different user device;
• means for prefiltering the data changes for the user devices such that only preselected types of data changes are used to update the user data on the user devices;
• and
• means for, in response to detecting a data change to the user data for at least one of the user devices, sending a real-time notification to other user devices for the user of the data change to prompt data synchronization on the other user devices.