Calendar alarm app for iPhone
Never miss a meeting again
OnTimer connects to your calendar and triggers loud, persistent alarms before meetings, calls, and appointments so they do not sneak up on you.
Free download • Connect your calendars in seconds
Works with Google & Microsoft calendars
People ask…
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.
Can I use multiple calendars with one reminder app?
Yes. OnTimer supports multiple calendars, including Google and Microsoft accounts.
Calendar reminders aren't alarms.
Most calendar reminders are passive notifications. They appear, you glance at them, and then they disappear into the rest of your day.
That is fine for casual reminders. It is not reliable when you actually need to show up on time.
OnTimer turns calendar events into loud, persistent alarms that are much harder to ignore.
- ✓Easy to swipe away notifications become real alarms
- ✓Meetings and appointments are harder to miss
- ✓You do not need to manually create reminders for every event
What is OnTimer?
OnTimer is an iPhone app that connects to your calendar and triggers loud, persistent alarms before meetings and events so you do not miss them or show up late.
It is designed for people who rely on their calendar but know that normal calendar notifications are easy to miss.
It works with your schedule. It does not replace your calendar.
Who should use OnTimer
OnTimer is especially useful for people who need something more reliable than standard calendar notifications.
Busy professionals
For people with packed workdays, client calls, internal meetings, and back-to-back schedules.
People who miss calendar notifications
For anyone who sees reminders but still loses track of time before the meeting actually starts.
People with time blindness or ADHD tendencies
For people who benefit from a stronger transition signal before it is time to leave or join.
Multi-calendar users
For people juggling work and personal schedules across more than one calendar.
Why OnTimer is different
Standard calendar apps are built to show notifications. OnTimer is built to get your attention before it is too late.
Features that matter
Connect multiple calendars
Connect Google and Microsoft calendars, including multiple accounts, so your reminders reflect your real schedule.
Automatic alarms for calendar events
OnTimer watches your schedule and prepares alarms for upcoming meetings, calls, and appointments.
Alerts you are less likely to miss
Unlike a standard notification, OnTimer alarms are designed to stay loud and visible until you dismiss them.
Time To Leave alerts
For events with a location, Time To Leave can alert you when it is time to head out based on travel time and traffic. This is a paid feature.
How OnTimer works
Connect your calendars
Link your calendars and choose your preferences.
OnTimer prepares alarms
Upcoming calendar events get alarms automatically.
Get alerted before it is too late
When the alarm fires, you know it is time to join, leave, or wrap up what you are doing.
Common questions
What is OnTimer?
OnTimer is an iPhone app that 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.
Stop missing meetings.
Download OnTimer and turn your calendar into a more reliable meeting alarm.