Everything on one screen: how often this usually needs to happen, the free way to set it on the iPhone you already own, and what changes if a phone call does it instead.
One-off — a single date and time. The free built-in option comes first below, because for plenty of people it is genuinely the whole answer.
One-off reminders carry the most risk per alert: there is no second chance next week and no habit to catch you if the single notification lands at a bad moment.
Why this one slips: People rarely forget the appointment; they forget the leaving time, which is the one number the calendar entry does not contain.
iOS deliberately exempts alarms from the silent switch and from Do Not Disturb, so a Clock alarm makes noise even on a muted phone. It costs nothing. If it works for you, you do not need us — the catch is that an alarm is one tap to stop, and taps are cheap.
A silent banner still loses here: the alert tells you the appointment is at three, not that you needed to be walking out the door at twenty past two.
With ReminderCall your phone rings like a normal incoming call — a real call over the phone network, not a banner and not an in-app alarm. You answer, and a voice reads the reminder out loud in the words you wrote. Answering is an action, which is harder to do absent-mindedly than clearing a notification.
To be precise about it: a call follows your ring settings rather than your notification settings. On hard mute it vibrates and takes over your screen instead of ringing out loud, unless you save the number as a contact with Emergency Bypass switched on yourself.
People rarely forget the appointment; they forget the leaving time, which is the one number the calendar entry does not contain.
Dates set by somebody else, where the reminder you actually need is the leaving time — not the appointment. The failure is almost never that you did not know — it is that the prompt arrived at a moment when acknowledging it was easier than acting on it. One-off reminders carry the most risk per alert: there is no second chance next week and no habit to catch you if the single notification lands at a bad moment.
Read next: how to never miss a doctor’s appointment again · helping elderly parents remember appointments · one-off and repeating calls
iOS deliberately exempts alarms from the silent switch and from Do Not Disturb, so a Clock alarm makes noise even on a muted phone. It costs nothing. If it works for you, you do not need us — the catch is that an alarm is one tap to stop, and taps are cheap.
The other free move, and often the more effective one: anchor it to something you already do without thinking — after the kettle goes on, before you lock the front door, as you sit down at your desk. A reminder attached to an existing habit needs far less from your phone. Try both for a fortnight before you pay anybody for this.
Get ReminderCall — free on the App Store Get →