Yes, both OneCal and Online Check Writer offer a Free Trial.
OneCal is designed for Large Enterprises, Medium Business and Small Business.
Online Check Writer is designed for Medium Business and Small Business.
Pricing for OneCal Starts at $3/User/Month when Billed Yearly whereas for Online Check Writer Starts at $1Pay As You Go.
Some top alternatives to OneCal includes Appointy, Calendly, Cogsworth, Book Like A Boss, EasyCalendar, Office Tracker, canUmeet, CalendarHero, DaySchedule, TimeSync, Calendbook, Calendar and CatchApp Bookings.
Some top alternatives to Online Check Writer includes CheckWriters, CloudBooks, Checkflo, Checkrun, CPE Cloud, Qualified, Workvivo, ScanWriter, IFTTT, Supermetrics and Drag.