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OpenApps

Scheduling

Sheets

Sheets by OpenApps is a free SignUpGenius alternative. Free. Unlimited sheets and sign-ups.

Free sign-up sheets for volunteers, potlucks and shifts. Make a sheet of slots, share the link, and people sign up in a tap. Each slot fills up to the number you set and never goes over. See everyone who signed up, export to CSV, and add slots to your calendar. No ads and no accounts.

Open Sheets Free. Unlimited sheets and sign-ups.

Instead of SignUpGenius

What you get, free

  • Item slots and time shifts, each with how many people it needs
  • A slot never goes over its number, even when people sign up at once
  • No account to sign up, and people can remove their own sign-up
  • The organizer sees contact details and exports CSV
  • Live updates on every open page
  • API for AI assistants: organize a sign-up end to end

Each sign-up is one small write; it stays free.

For AI assistants

An assistant can make a volunteer roster or potluck sheet, share the link, and report who signed up for what.

The app's guide for assistants is at sheets-free.openapps.xyz/llms.txt, and its API at https://functions.bounded.sh/apps/1b07970e223c44d2d70d24f6/api.

How it compares

AppFree planPaid plans
SheetsFree. Unlimited sheets and sign-ups.None
SignUpGeniusFree with no limit on sign ups, but ads show on your sign up pages until you pay.SignUpGenius has a free version with ads, and paid plans from about $12 a month for more features.

Free plans checked October 2026 on each company's own page: SignUpGenius. Paid prices are approximate and change often.

Questions

Is there a limit?
No limit on sheets, slots or sign-ups, and no ads.
Can a slot be overbooked?
No. The rules that store sign-ups refuse one past the slot's number.
Do people need an account?
No. They type their name and sign up.
Can my AI assistant set one up?
Yes, through the public API.

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Use Sheets now

No account. Free for as long as it exists, and it is an OpenApp, so its source is public.

Open Sheets