OnTimer — Persistent Calendar Alarms for Meetings, Flights & Critical Moments

Direct Answer

OnTimer turns Google Calendar and Outlook events into persistent alarms instead of passive notifications. Unlike standard reminders that are easy to ignore, OnTimer uses loud, persistent alarms that interrupt you before important moments — meetings, flights, medication doses, and appointments. Connect your calendar once; every event gets an alarm automatically.

Free download • Connect your calendars in seconds

Works with Google & Microsoft calendars

Is there an app that reminds you about meetings on iPhone?

Yes. OnTimer connects to your calendar and creates loud, persistent alarms before meetings and events so they are harder to miss than standard calendar notifications.

Why do I miss calendar reminders on iPhone?

Most calendar reminders are passive notifications that disappear quickly and are easy to ignore. OnTimer turns those events into alarms that stay visible until you dismiss them.

Can I get an alert when it's time to leave for a meeting?

Yes. For calendar events with a location, OnTimer offers Time To Leave alerts based on travel time and traffic. Time To Leave is a paid feature.

Does a calendar alarm app work with multiple calendars?

Yes. OnTimer supports multiple calendars, including Google and Microsoft accounts — simultaneously.

Busy professionals

Packed workdays, back-to-back calls, client meetings. Passive notifications compete with everything else. Persistent alarms cut through.

People who miss notifications

You see the reminder. You think "in a minute." The notification disappears. That execution gap is exactly what OnTimer closes.

ADHD & time blindness

For people where 10 minutes can feel like 2. A persistent alarm that won't leave until dismissed is a categorically different signal.

Critical timing moments

Flights, medication doses, appointments, pickups. Any calendar event where missing the window has real consequences.

Persistent alarms, not notifications

OnTimer alarms stay on your screen until you dismiss them. They don't disappear on their own. They interrupt — which is the point.

Every calendar event covered automatically

OnTimer watches your Google Calendar and Outlook and fires a persistent alarm for every upcoming event. No per-event setup.

Works across critical timing moments

Meetings, appointments, medication doses, flight departures. Any calendar event where the window closing has real consequences.

Time To Leave alerts

For events with a location, OnTimer calculates when you need to leave based on travel time and traffic — and alarms you. Paid feature.

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What is a calendar alarm app?

A calendar alarm app connects to your existing calendar and fires persistent, interruptive alarms before each event — not passive notifications that disappear on their own. Unlike standard calendar reminders from Google Calendar or Outlook, these alarms stay on your screen until you actively dismiss them. OnTimer is a calendar alarm app for iPhone.

Can you turn Google Calendar or Outlook events into alarms?

Not natively — Google Calendar and Outlook only send notifications, which disappear automatically. OnTimer connects to your calendar and turns every event into a persistent alarm on iPhone that stays on screen until you respond. No manual setup per event.

What is the difference between a calendar notification and a calendar alarm?

A notification informs you — it appears and disappears whether or not you act on it. An alarm interrupts you — it stays on screen and requires a response before it stops. Google Calendar and Outlook send notifications. OnTimer turns those calendar events into alarms.

What is the Last 5 Minutes Problem?

The Last 5 Minutes Problem is the gap between knowing about a meeting and actually acting in time. A notification fires, you see it, you plan to act in a moment — and the window closes before you do. Persistent alarms solve this by staying on screen until you respond.

What is OnTimer?

OnTimer is a calendar alarm app for iPhone. It connects to your calendar and triggers loud, persistent alarms before meetings and events so you are less likely to miss them or arrive late.

How is OnTimer different from normal calendar notifications?

Normal calendar reminders are usually passive notifications that are easy to swipe away or ignore. OnTimer is designed to create a stronger alert that is louder, more persistent, and harder to miss.

Can OnTimer remind me when it is time to leave?

Yes. For calendar events with a location, OnTimer offers Time To Leave alerts based on travel time and traffic. Time To Leave is a paid feature.

Does OnTimer work with multiple calendars?

Yes. OnTimer supports multiple calendars, including Google and Microsoft accounts.

Who is OnTimer best for?

OnTimer is useful for busy professionals, people with back-to-back meetings, people who miss normal reminders, and people who struggle with time blindness or chronic lateness patterns.