Is the class timetable maker really free?
Yes, and there is nothing to sign up for. No account, no email address, no trial that runs out, no limit on how many classes you add and no watermark on the printout. It is free because it is useful on its own, and because some of the people who use it will eventually want the enrolments to arrive by themselves.
Where is my timetable saved?
In this browser, on this device, and nowhere else. Nothing is uploaded to Picktime and there is no account holding it. It survives closing the tab; it does not survive clearing your browsing data, and it will not appear on the studio laptop. Download CSV or print it if you want a copy that lasts.
Can I print it, or open it in Excel?
Both. Print puts the grid on the page on its own, with no navigation, no footer and no form around it. Download CSV gives you one row per class (room, start, end, length, class and tutor), which opens directly in Excel, Numbers or Google Sheets.
Can students enrol in these classes?
Not from here. This is a layout tool, so the timetable only changes when you change it. If you want people to see the term, pick a class and have it land on your register, that is a booking page rather than a timetable, and it is what the free Picktime plan does.
How does it decide two things clash?
Two classes clash when they overlap in time and share a room, or overlap in time and name the same tutor. The tutor half is the one worth having: a room double-booking is usually obvious on the grid, and one person teaching in two studios at once is not.