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Building one schedule is free and does not expire. The free preview shows one sample turn plus one block from each cited clause. No card now, and no clock. Downloading the calendar file, or publishing a feed other people can subscribe to, are the paid tiers.

What happens next

Start from the worked example. A complete two-household schedule is waiting, so there is nothing to write before you can see the product work.
Publish it. The rules resolve to dated blocks, each one naming the rule and the clause it came from.
Subscribe a calendar. Google, Apple and Outlook each take a different path and we walk through all three.

You can see the whole thing first. Open the worked example, no account needed.

Before you start

Worth knowing now rather than after you have moved a household onto it.

Not a calendar application: There is no event creation, no invitations, no attendees and no free/busy. exceptwhen derives a calendar from rules; it does not accept events you type in, and it will not replace the calendar app you already use.
Not a solver: It resolves which of your rules wins on a given day. It does not search for a schedule, balance fairness, or fill a rota. Shift coverage and league fixtures are constraint problems and this is not one.
Not a legal authority: The output is one recorded interpretation of a document, bound to the clause it came from. It is not advice and it is not a ruling about what your document means.
Read-only, one direction: Calendars subscribe to a published feed. Nothing you or anyone else changes in a calendar app comes back, because an event edited there has no rule behind it and no place in the model.
Not a notification channel: Calendar subscriptions are pull. Your app decides when to refresh and that is usually hours. Anything same-day needs a different route to the people involved.
No AI deciding your schedule: Nothing in the resolution path is a model. Rules are read, ranked and applied the same way every time, and every published instant names the rule that produced it.

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