Booking a haircut or a pedicure still requires you to call ahead most of the time. It's weird. You can make restaurant reservations on OpenTable, and you can order a pizza without having to talk to a bored employee using Seamless/GrubHub. But, in 2014, there still isn't a standard go-to for making appointments. Square would like to change that. On Monday, the mobile payment company announced that it was officially launching one of the many new products hinted at in our Fast Company feature: "Square Appointments." The company describes the e-booking system as a "built-in receptionist," and has been beta testing it with a few shop owners. Basically, the calendar system allows customers to book their own appointments online, even if your business doesn't have a website, and it can send out text reminders to customers so that they don't forget their 4 p.m.