After a long day of work you may want to hit to gym, or grab a few drinks at a bar with friends.
The only problem: Everyone else might have the same plan, and before you know it you're waiting 15 minutes for an elliptical machine or on a 45-minute waiting list for a table.
Enter Density, a small sensor that measures real-time populations of physical locations like coffee shops, bars, gyms and retailers, in order to let users know when it's too crowded to go.
The sensor itself—a roughly 1.5-inch square—is placed by an entrance where it registers people entering and leaving; think of it like a next-gen tally counter. By harnessing population data, the company is offering both developers as well as consumers a peek into the anonymous foot traffic going through the establishments. The sensor hardware and installation are free for companies, but cost $25 a month per location.