How do I add a calendar to my app without building scheduling logic?

If you want a calendar in your app without building scheduling logic yourself, the usual approach is to embed or integrate a calendar service/API that already handles availability, events, reminders, and booking rules.

Best options

1. Use a calendar booking API/service

Good if users need to book meetings, appointments, or time slots.

Popular choices:

• Calendly API / embed — easiest for booking flows
• Google Calendar API — for syncing events and availability
• Microsoft Graph Calendar API — for Outlook/Office 365 users
• Cronofy — unified calendar API across Google, Microsoft, Apple, etc.
• Nylas — similar unified calendar/email integration

What they give you:

• Free/busy lookup
• Event creation/update/delete
• Sync with user calendars
• Time-zone handling
• Notifications/webhooks

2. Embed a calendar UI component

Good if you just need a visual calendar in your app.

Options:

• FullCalendar (very popular, JS library)
• React Big Calendar
• Syncfusion / Kendo / Telerik UI components
• DayPilot

These handle:

• Month/week/day views
• Drag-and-drop
• Event rendering
• Recurring event display

But note: these are mainly UI components—you still need backend logic if you want booking rules or availability.

3. Use an appointment scheduling platform

Good if you want the fastest path with minimal custom code.

Examples:

• Calendly
• Acuity Scheduling
• SimplyBook.me
• YouCanBook.me

You can often:

• Embed booking pages
• Receive webhooks when bookings happen
• Sync to your app via API

Recommended approach by use case

• Need a calendar view only? → Use FullCalendar or a similar UI library
• Need users to book appointments? → Use Calendly or Acuity
• Need deep calendar sync across providers? → Use Cronofy or Nylas
• Need Google/Outlook integration only? → Use their native APIs directly

Typical architecture

1. User signs in and connects their calendar
2. Your app checks availability via provider API
3. User selects a time slot
4. Your app creates the event through the API
5. Webhooks keep your app in sync with changes

Important things to avoid building yourself

• Recurring events logic
• Time zone conversions
• Conflict detection
• Syncing across multiple calendar providers
• Reminder/notification delivery

If you want the simplest solution

• For booking: Calendly embed + webhook/API
• For custom calendar UI: FullCalendar
• For multi-calendar sync: Cronofy or Nylas

If you tell me:

1. your stack (React, Next.js, mobile, etc.), and
2. whether you need booking or just display,

I can recommend the best option and show a quick setup example.