Is Cal.com or TickTick free?

Both can be used for free. Cal.com: Free plan, paid from $15 a month. TickTick: Free plan, paid upgrades.

Do I need to install Cal.com or TickTick?

No. Both run in a web browser, so you can open either one and start.

Price, ratings and what each one does, side by side. Every fact here comes from their listings on Linkstore.

Open scheduling that you can host yourself.

A to-do list with a calendar and a pomodoro timer.

Cal.com

TickTick

Share a booking link, connect your calendars and let people pick a time. Open source and extensible.

TickTick handles lists, habits, a calendar view and focus timers. The free plan covers everyday use.

Apps that do a similar job, closest matches first.

Google Calendar
A calendar for your day, shared with other people.
ProductivityNewFree
Open
FloHub
One calm place for your whole day — and a cat who actually gets it. Tasks, calendar, habits, notes and journal, guided by FloCat.
ProductivityNewFreemium
Open
Calendly
Let people book time with you without the back and forth.
ProductivityNewFreemium
Open
Motion
Auto-schedules your tasks onto the calendar.
ProductivityNewPaid
Open
Notion Calendar
A fast calendar that sits on top of Google Calendar.
ProductivityNewFree
Open
tasks
Capture daily tasks, track your progress, and sync between devices with WebRTC
Productivity5.0Free
Open