ScheduleShare: combine and share multiple Google Calendars with this web app

At long last, hashtags have relevance beyond describing that Instagram photo of your lunchtime sandwich being filter-free.
ScheduleShare is a web app for people with multiple Google Calendars that combines them all into a single, read-only calendar they can then selectively share with, for instance, clients or friends.
The app enhances this selective sharing with plain text filters.

• In the notes section of a Google Calendar event, type “#hide” to ensure no one sees the calendar entry, regardless of whether you’ve already shared your calendar. Type “#busy,” and every person with whom you’ve shared your calendar will see that date as unavailable.
• In other words: the app lets users pick which event details are shown “based on matching rules in the event text itself,” as the ScheduleShare website explains.
• From there, ScheduleShare users work with Google Calendar as they normally would, but with feeds enabled to ensure Calendar entries are shared with people according to the rules established via precisely worded event details.

Credit for the product goes to Ryan Ahearn, a programmer and developer since August 2011 with CoshX Labs, a web development consulting shop with headquarters in Charlottesville, Va., and team members scattered across these United States. The 29-year-old Ahearn moved to Baltimore with his wife the month he started full-time with CoshX, and now lives in Canton and works occasionally from the Beehive coworking space inside the Emerging Technology Center on Boston Street.
ScheduleShare, he said, was originally built as a hackathon project during an internal company hackathon CoshX hosted. Ahearn, a computer science grad from the University of Virginia, was looking for a way to cut down on the e-mails he was sending to CoshX clients — with ScheduleShare, all he had to do was send his availability via a Google Calendar that his various clients always had access to.
Three different levels of pricing are available based on the number of Google Calendar feeds a ScheduleShare user would need: the highest pricing tier, $10 per month, allows for an unlimited number of feeds.
Ahearn said the app only has a “handful of users” so far (it officially launched last month). And the big feature to come will be the option to add Apple iCloud calendars and other feeds, like work-related Microsoft Outlook calendars, so use of the product isn’t dependent solely on Google Calendars.