Choose OnTimer if
People who like their current calendar and want a focused alarm layer that automatically helps them act on time.
Calendar alarm comparison
OnTimer vs Fantastical
Choose OnTimer when you want to keep your existing calendar app and add persistent alarms, per-event controls, and flight-aware leave timing. Choose Fantastical when you want a complete calendar interface with calendar views, event creation, tasks, scheduling tools, and time-to-leave notifications.
Last reviewed October 13, 2026
Choose Fantastical if
People looking to manage calendars and tasks inside a full calendar application across Apple platforms and Windows.
Key differences
| What to compare | OnTimer | Fantastical |
|---|---|---|
| Product role | Alarm layer for an existing calendar | Complete calendar and tasks application |
| Alarm focus | Persistent alarms with per-event sound and control | Event and task notifications, with urgent alarms listed in Premium |
| Travel timing | Time To Leave plus automatic Time To Fly | Travel time and time-to-leave notifications |
| Calendar management | Open the source event in your calendar | Create, edit, view, and organize events and tasks |
| Best decision | Add stronger alarms without replacing your calendar | Replace or expand your calendar workflow |
Keep your calendar. Add an alarm layer.
OnTimer is free for one calendar provider on iPhone.