Yes, both Intervals and Time Doctor offer a Free Trial.
Intervals is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Time Doctor is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Intervals Starts at $29/Month whereas for Time Doctor Starts at $7/Month.
Some top alternatives to Intervals includes Quickbase , Smartsheet, ClickUp, Zoho Projects, TimeTracker App, Tick, TimeTrack, Time Track Bill, TimeControl, Wrike, Track My Work, Teamwork, ProjectManager.com, ProWorkflow, Quick Base and TaskBlast.
Some top alternatives to Time Doctor includes clockodo, TMetric, Toggl Track, Hubstaff, TrackingTime, Clockify, TimeTrack, Timesheet, AtTrack and Time Tracker by eBillity.