What Is an iCal Feed and Why Should Your Clinic Use One?

The Calendar Problem Every Doctor Recognises

Most doctors operate across multiple calendars simultaneously: their clinic software shows patient appointments, their phone calendar has personal commitments, hospital rotas, CME events, and committee meetings. Keeping these in sync manually is friction-creating and error-prone.

The iCal feed solves this elegantly.

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What Is an iCal Feed?

iCal (Internet Calendar) is a file format and protocol that allows calendar data to be shared between applications. Specifically, an iCal feed (also called an iCal URL or calendar subscription) is a URL that any calendar application — external calendar, device calendar, desktop calendar, calendar app, etc — can subscribe to.

When your clinic software publishes an iCal feed and your phone subscribes to it, your appointments appear in your phone calendar automatically, and update whenever the clinic schedule changes.

The standard was defined in RFC 5545 and has been universally supported by major calendar applications since the early 2000s. It is not a new technology — but it is one of the most underused features in clinic management software.

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How It Works: Step by Step

1. Your clinic software publishes an iCal URL — a unique, private URL per doctor that returns a live feed of their scheduled appointments.

1. You subscribe in your calendar app:

• external calendar: Settings → "Other calendars" → "From URL" → paste the iCal URL
• device calendar: File → New Calendar Subscription → paste the URL
• desktop calendar: Add Calendar → From Internet → paste the URL

1. Your appointments appear in your personal calendar, alongside your other commitments, colour-coded and searchable.

1. The feed stays live — when a new appointment is booked, cancelled, or rescheduled in the clinic software, your phone calendar reflects the change automatically (with a short sync delay, typically 15–60 minutes depending on the client app).

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Why This Matters for Clinics

For doctors: A single calendar view across your clinic, hospital, and personal schedule. No more checking multiple apps before accepting a speaking engagement or scheduling personal commitments.

For multi-doctor clinics: Each doctor has their own iCal URL. They subscribe independently, giving everyone a personalised view without sharing access to the main clinic system.

For multi-branch doctors: If you work at multiple locations, Clinit's iCal feed aggregates all your appointments across all branches into a single feed.

For locum and session doctors: Visiting doctors who work at multiple clinics can subscribe to each clinic's iCal feed and see all their sessions in one calendar.

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Privacy and Security

Each iCal URL is:

• Unique per doctor — other staff cannot access your iCal URL
• Revocable — if you share it accidentally, you can generate a new URL in Clinit settings, invalidating the old one
• Read-only — subscribing to the feed does not give the calendar app any write access to your clinic system
• Patient data-limited — Clinit's iCal feed includes appointment time, type, and a reference number, but does not include patient surnames or clinical details in the calendar event title, protecting patient confidentiality

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Setting Up iCal in Clinit

1. Go to Settings → Calendar → iCal Integration
2. Click Generate iCal URL
3. Copy the URL provided
4. Open your calendar application and add as a subscribed calendar
5. Choose a distinctive colour to differentiate your clinic appointments

The feed is generated immediately and begins syncing your next 60 days of appointments. Past appointments are not included by default (configurable).

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Beyond Personal Calendars: Embedding in Websites

iCal data can also power public-facing availability calendars on clinic websites. If a clinic publishes a sanitised iCal feed showing available appointment slots (without patient data), it can be embedded in the website booking widget to show real-time availability.

This is a more advanced use case but eliminates the lag between online booking availability and the actual clinic schedule.