---
title: Reminders
description: A notification before an appointment or a task with a time - with the C/ marker or for every line with a time, from every profile, with buttons in the notification and a sound of its own per profile on Android.
reviewed: 2026-11-11
---

## Where there are reminders {#where}

Reminders exist in the Android app - from Google Play and without Google - and in the Windows app
from the Microsoft Store. The Linux app and the browser preview on the website have none. Reminders
are part of [tagwerk Pro](../pro/index.md).

They are switched on per device: *Settings → Reminders → Remind me on this device*. Switched on on
the phone and on the computer, both remind you. What the section's settings do is in
[Settings](../settings/index.md#reminders).

Every profile reminds, not only the one that is open.

## The C/ marker {#marker}

A line with a time gets a reminder when it contains `C/` - C for cue. After the slash you can say
how long before:

```tagwerk
19:00 Dentist C/
19:00 Dentist C/PT30M
- [ ] 14:00 Quote to @paul C/PT15M
09:00 Flight to Vienna C/PT2H
```

| Marker | Reminds you |
| --- | --- |
| `C/` | at the time |
| `C/PT15M` | 15 minutes before |
| `C/PT2H` | 2 hours before |
| `C/PT1H30M` | an hour and a half before |
| `C/P1D` | a day before |

The length follows ISO 8601, as in [recurrence](../appointments/index.md): `P` for the length, `T`
before hours and minutes. Upper and lower case are the same.

Without a time the marker has nothing to count back from, and an appointment that was called off
reminds you of nothing. Words like `C/C++`, `AC/DC` or `c/o` are not a marker. In other editors
`C/PT30M` stays plain text. The exact rule is in the
[format specification](../../format.html#reminders).

## Setting it in the app {#in-the-app}

Outside the note the marker is not shown as text. The task list shows a bell beside the task, and
the widget card shows the bell and the lead under its title, such as *15 min before*. Widget rows
and notifications leave it out.

You do not have to type the marker. The *Edit time* sheet - a tap on a time in the note, or *Time*
in the toolbar - has a *Reminder* row, and so does the task form once the task has a time:

| Choice | Writes |
| --- | --- |
| *None* | no marker; one that was there is removed |
| *At the time* | `C/` |
| *5 min before* to *1 hour before* | `C/PT5M` to `C/PT1H` |
| *1 day before* | `C/P1D` |

A marker none of the choices says, such as `C/PT45M`, is shown as a choice of its own and stays
as it is. With *Every line with a time* switched on for the line's kind, *None* is called *As in
settings*: the line then reminds you with the lead time from the settings.

Under the choices the row says when this device will not remind you - Linux and the browser
preview, without Pro, or with reminders switched off. The marker is written all the same; a phone
the note reaches through your sync may act on it.

## Every line with a time {#every-line}

Under *Which lines* you can choose *Every line with a time* instead of *Only lines with C/*. Then
every line with a time reminds you, with the *Lead time* from the settings. A line with `C/` keeps
its own lead time.

*Remind me of* has *Appointments* and *Tasks with a time* separately. Tasks start switched off: for
a task, the time usually means "from then on", not "be there on time".

Before you switch, the section shows how many reminders would be due in the next 14 days. In a notes
folder with many times that is quickly a large number.

Recurring appointments remind you on every day they fall on, including days whose note does not
exist yet.

## What arrives (Android) {#android}

A reminder is a notification carrying the line's text. With more than one profile, the profile is
named below it.

A task has three buttons, an appointment one:

| Button | What it does |
| --- | --- |
| *Done* | Ticks the task off, in its own profile, without opening the app. |
| *Later* | Reminds you again in ten minutes. |
| *In progress* | Sets the task to `[/]`. |

A tap on the notification opens the same card as a tap on a row in the
[widget](../widgets/index.md#card), with *Later* added. For an appointment the card offers *Another
time*, *This one is off* and another day.

After a button the notification goes at once, and the widget shows that it is updating. Where it
does not work out, the notification comes back and says why:

- *The task has changed in the meantime. Tap to open it.* - the line was edited after the reminder.
- *Waiting for readings. Tap to enter them.* - the task or a sub-task waits for a
  [reading](../tags-and-search/index.md#readings); the card asks for it.
- *That did not work. Tap to open the task.*

When you tick a task off in the app, in the widget or on another device, its notification goes by
itself.

## Sounds per profile (Android) {#sounds}

Android keeps two notification categories for every profile: *Tasks* and *Appointments*. In the
app's Android settings you can give each a sound of its own or switch it off. *Settings →
Reminders → Choose sounds* leads there. With a single profile the group is called *Reminders*; from
the second profile on it carries the profile's name.

The categories exist as soon as reminders are switched on, so before the first reminder. When you
delete a profile, its categories go with it.

## What arrives (Windows) {#windows}

On Windows a reminder is a Windows notification without buttons. A click opens tagwerk at the
line, in the right profile. With more than one profile the notification names it.

## When a reminder does not arrive {#delivery}

tagwerk is not an alarm clock. *Settings → Reminders → Delivery* says what the device does with a
reminder:

- *Allow notifications* appears when notifications are switched off for tagwerk. Then no reminder
  arrives.
- *Allow exact alarms* appears on Android when exact alarms are not allowed. Then reminders may
  arrive a few minutes late.
- Battery saving and battery optimisation can delay or suppress reminders. If you rely on them,
  exclude tagwerk from battery optimisation in the Android settings.
- After *Force stop* in the Android settings, reminders only come back once you open tagwerk. After
  the phone restarts they come back by themselves.
- On Windows reminders only arrive while the computer is switched on and awake.

What has gone by is not made up for. A reminder up to 15 minutes late still arrives; a device that
was off for longer does not announce the ones it missed.

## What is stored {#stored}

All the note holds is the marker. tagwerk writes nothing back into the line - no reminder shown,
swiped away or put off. The schedule is worked out from the notes and recalculated after every
change, a sync included. Stored on the device are only the settings and a *Later* until it has run
out.