Sync your reminders to the iPhone Calendar app

Remi can copy every active reminder into a calendar on your iPhone as an all-day event, so your reminders sit next to your appointments. The sync is one-way: Remi writes to the calendar, and the calendar never changes Remi.

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What calendar sync does

Turn on Sync to Calendar in Remi's settings, pick a destination calendar, and Remi creates one all-day event per active reminder in it. Open the Calendar app and your reminders are there. Remi is the source of truth, and the calendar is a read-only view of it.

Apple's own apps already connect in one direction. On a Mac, Calendar can show reminders from the Reminders app through its Scheduled Reminders checkbox, which covers reminders that have a date. Remi's reminders often have none: "sometime early in November" or "mid March" is a flexible reminder. Calendar sync gives those a visible place anyway, as an event that spans the days of the timeframe. To see how Remi sets those timeframes, read Flexible scheduling.

How to turn it on

1. In Remi, open the "…" menu and choose Settings, then tap Calendar sync.
2. Switch on Sync to Calendar. iOS asks for calendar access. Allow it.
3. Open Destination calendar and choose the calendar you want. Remi may already have picked one for you. The chosen calendar appears beneath the picker with its colour and account name.
4. Remi syncs as soon as a calendar is chosen. A line under the switch reads "Last synced" with how long ago.
5. Open the Calendar app and find your reminders as all-day events. Each event title is the reminder title. The event note starts with a rabbit and "Created by Remi", followed by your reminder notes if you wrote any.

After that it runs by itself. Remi syncs every time it saves a reminder: when you add, edit, complete or delete one. If you refuse access, Remi switches the toggle back off and shows a "Calendar Access Disabled" alert with an Open Settings button. Turning the switch off removes every event Remi created.

Options and what each reminder becomes

There are only two settings, the on/off switch and the destination calendar. The rest follows from the reminder's own type:

• Alarms. If a reminder has notifications on, its event also gets an alert on its first day.
• Early, Mid, Late boundaries. The Early, mid, late screen offers three presets: 10/20, Balanced and 7/21. When you change the preset, Remi removes its events and recreates them with the new day ranges.
• Switching calendars. Choose a different destination and Remi moves its events there.

Calendar sync sits in the free app. The Calendar sync screen carries no Premium lock.

When to use it

One view of the month

If you plan your days in the Calendar app, a reminder such as "book the dentist, mid October" now sits across October 11 to 20 beside your meetings. You do not have to remember to open a second app.

Seeing a timeframe, not a deadline

An all-day event across ten days shows a window instead of a fake due date. That fits reminders you can do any day within it.

A calendar you already trust

The destination is an ordinary calendar on your iPhone, and the picker shows which account it belongs to. Choose the one you already check every morning, and Remi's reminders join it without a new habit.

Alerts through the Calendar app

Events get an alert on their first day when the reminder has notifications on, so the Calendar app can nudge you as well. For how Remi's own notifications differ from alarms, see reminder versus alarm.

Limits

• One-way only. Edit or move an event in Calendar and the next sync overwrites it. Delete one and Remi recreates it. Change the reminder in Remi instead.
• Someday reminders are skipped. A reminder with no date has nothing to place in a calendar.
• Recurring reminders show one event. Only the next open occurrence appears, never a repeating series.
• All-day only. Events have no start time. Remi does not create timed events.
• Syncs when Remi saves. Edits made inside the app trigger it. Remi has no schedule that syncs in the background on its own.
• Completing removes the event. A finished reminder drops out of the calendar at the next sync.
• One destination. You choose a single calendar at a time.

Reminders that Calendar already shows from the Reminders app are a separate thing, and Remi does not touch them. If events do not appear, check that the destination calendar is switched on in the Calendar app, and read the troubleshooting guide.

Updated 2026-11-01. Written by Emils Ozols, who makes Remi.