I’ve seen a picture posted on this forum about placing a Android tablet next to OpenSprinkler to give it sort of a touch screen interface. Can’t remember which post, but it definitely makes a lot of sense given how cheap these tablets and phones cost these days. About the Google Calendar, I only had experience writing a Google Calendar based program for OpenSprinkler Pi (which was improved by Jason Mechler to use the new Google API). One thing that we have been working on for the next firmware update is to send UDP notifications for any sprinkler events, so this can log the events to an external UDP server.