Source

# Book by OpenApps: a free Calendly alternative

Book is a free booking page for one-on-one meetings. Set the hours you are free, paste your meeting link and share your page. People pick a time in their own time zone and get the link. No sign-up, no paid plan, no limit on pages or bookings.

Web app: https://book-free.openapps.xyz/

## What it does

- One page per kind of meeting, as many pages as you like, at https://book-free.openapps.xyz/<your-address>.
- Weekly hours in 15-minute steps, days off for holidays, a minimum notice, how far ahead people can book, and a break after each meeting.
- Meetings of 15, 30, 45 or 60 minutes on your own Google Meet, Zoom or Teams link. Only people who book see the link.
- Up to 5 questions for the person booking, besides name and email.
- Times show in each visitor's own time zone, with the zone named.
- Two bookings can never share or overlap a time, even when two people click at once.
- After booking, the person gets the meeting link, a calendar invite (a file, or Google Calendar) and a private link to move or cancel the booking.
- You see each booking on your page as it happens. Subscribe to your page's calendar feed and bookings show up in Google Calendar, Apple Calendar or Outlook.

## What it does not do

- It does not read your calendar, so it cannot see when you are busy. Block time with your weekly hours and days off.
- It does not send emails or reminders.
- Calendar apps re-read a subscribed feed on their own schedule, so a new booking can take hours to appear in Google Calendar.

## How to use it

1. On https://book-free.openapps.xyz/, type your name and meeting link, pick the length and your weekly hours, and create the page.
2. Share the page link. Keep your admin link: it opens your bookings and settings on any device.
3. In Settings, add days off and subscribe to the calendar feed.

## Links an assistant can send

- https://book-free.openapps.xyz/<handle>?date=2026-10-21&tz=Europe/London&name=Alex%20Kim&email=alex@example.com opens the page on that day, in that zone, with the form filled.
- A booking's manageUrl opens it on any device, to move or cancel it.

## API

A public HTTP API with no key: make pages, read open times, book, move and cancel bookings, and read a page's bookings with its owner key.

- Base URL: https://functions.bounded.sh/apps/7385a6c1c47153b1728160ff/api
- Guide: https://book-free.openapps.xyz/llms.txt
- OpenAPI: https://book-free.openapps.xyz/openapi.json

## Compared with Calendly and Cal.com

Checked October 2026 on calendly.com/pricing and cal.com/pricing.

- Calendly's free plan allows one event type and one connected calendar, sends booking emails and keeps reminders for paid plans ($10 or $16 per seat a month, billed yearly).
- Cal.com's free plan allows unlimited event types and calendars for one person, with email and SMS notifications. Teams cost $12 per user a month, billed yearly.
- Book has no paid plan, no account and no limit on pages, and a public API with no key. It does not read calendars or send emails.

## Questions

**Is there a free alternative to Calendly?** Yes. Book is a free booking page for one-on-one meetings, with no paid plan and no limit on pages or bookings.

**Is Book really free?** Yes. There is no paid plan, no ads and no limit. Each booking is a few tiny writes, and OpenApps pays for them.

**Can people reschedule?** Yes. Each booking link has Change time: the person picks another open time, and the old time opens up for others in the same step.

**Do I need an account?** No. Your page belongs to the browser you made it in and to its admin link.

**Can my AI assistant use Book?** Yes, through the public API above.

Book is an OpenApp: free, with public source and its own agent. Part of OpenApps free apps: https://free-apps.openapps.xyz/