Other features included large pulls on lamps, C-handle drawer pulls that are easy on arthritic hands, wide spaces in the bedroom and the closet that accommodate wheelchairs, multi-leveled hanging bars and pull-out drawer space in the closet, and threshold-free transitions from room to room.

CNN: Don't let disabilities or age rob you of a stylish home

This new wave of impromptu-activity apps will have to compete against the gold standard of location-based services: Foursquare, which is a free smartphone app that tells friends where you're hanging out.

BBC: Four new impromptu-activity apps