Appointment slots and sign-ups in Google Forms™: set spots per time, full slots close themselves, every booking lands on Google Calendar™.
Listing updated:July 22, 2026
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No users
Overview
A booking form that can't double-book.

Slot Booking turns a Google Form™ into a scheduling sheet with real inventory: you set the times and how many people fit in each one, and the form does the rest. When a slot fills, it disappears from the form on its own. Every booking becomes an event on your Google Calendar™ with the respondent added as a guest, so their confirmation is the calendar invite itself.

Built for volunteer sign-ups, parent-teacher conferences, office hours, appointment slots, equipment checkout, tutoring sessions, club tryouts, and any sign-up sheet where a time can fill up.

WHAT IT DOES

- Slots with capacity. One spot for appointments, or ten for the volunteer shift or the parent-teacher table. The form shows how many spots are left in each time, and group slots work just as well as 1:1 bookings.

- Full slots close themselves. The moment a slot fills, it leaves the form. If two people race for the last spot in the same second, exactly one gets it, and the other is emailed right away to pick a new time. Nobody walks away believing they're booked when they aren't; even an empty submission gets an honest "nothing was booked" note.

- Bookings land on your calendar. One event per slot, respondents as guests, times shown in your calendar's own time zone. Cancel the way you cancel anything: delete the event, the slot reopens on the form, and the guests get Google Calendar™'s standard cancellation notice.

- You control the booking window. First and last day to offer, how far ahead the form looks, a cutoff so nobody books five minutes before the slot starts, and which days of the week appear.

- You stay informed without watching. A heads-up email when something needs you, a daily or weekly who's-booked summary if you want one, and a roster view with a calendar link for every slot.

- Honest limits. If your settings generate more times than a dropdown can hold, the form says so and rotates later times in as earlier ones fill or pass. Nothing is silently hidden.

WHY THIS ONE

Booking tools inside forms have a reputation for quietly overbooking. This one was built backwards from that failure: bookings are counted where they live, on the calendar itself, and the form is never allowed to promise a spot it doesn't have. No accounts, no external service, no payments plumbing. Everything happens inside your own Google account.

GETTING STARTED

Install, open your form, click the puzzle-piece icon, then Slot Booking. Pick a calendar, set your times and capacity, save. The slot question appears on your form, filled with real times. That's the whole setup.

Free during early release.

Questions? Email support@getmarinette.com and a real person will get back to you!

Google Forms™, Google Calendar™, and Google Workspace™ are trademarks of Google LLC. Slot Booking is an independent product and is not affiliated with, sponsored by, or endorsed by Google LLC.
Additional information
PricingFree of charge
Developer
Non-trader
Privacy policy
Terms of service
Slot Booking for Forms™ will ask for the permissions shown below. Learn more
Slot Booking for Forms™ will need access to your Google account
This will allow Slot Booking for Forms™ to :
View and manage forms that this application has been installed in
View and edit events on all your calendars
See and download any calendar you can access using your Google Calendar
Display and run third-party web content in prompts and sidebars inside Google applications
Allow this application to run when you are not present
Send email as you
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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