Groupon today launched a wide beta of its Groupon Scheduler product. The Scheduler is an online calendaring tool that allows service businesses such as spas, yoga studios, contractors and photographers to take reservations online. It’s open to all merchants, not just companies that run deals with Groupon. The daily deals company is billing it as a “free trial,” and it’s unclear whether Groupon will eventually charge for the service. Groupon did not respond to two requests for comment on this story.