Tvheadend

Sky boxes and some PVRs have a function called reminders or something similar that acts in a similar way to recordings, except that instead of recording it simply notifies a user that program is about to start. Having this function within TVH server would allow two things to occur:

1) Single storage for all clients and their reminders, would allow relinking should a client have to be reinstalled
2) Would allow reminders to use the series link option (auto-rec and series ID etc.) to remind every time the new episode is ready to start.

A client would simply have to have an alternative action button that is reminder rather than record that pushes to TVH to store the details and then pulls on startup or at the defined interval to get the data from the server.

Android/iOS clients could implement this more easily by storing the data client side and then asking the server to populate with the latest data when it connects. This would allow these devices to almost fully replace a STB such as the Sky box.