Calendar alarm app for Google & Outlook
How to Turn Calendar Events Into Real Alarms
Google Calendar and Outlook send notifications. Notifications disappear. Real alarms interrupt you and stay on screen until you act. OnTimer turns every event in your calendar into an alarm — automatically.
Works with Google Calendar & Microsoft 365 / Outlook Calendar
Direct Answer
To turn calendar events into real alarms: use OnTimer. It connects to your Google or Outlook calendar, detects every upcoming event, and fires an interruptive alarm before each one — not a notification that disappears, but an alert that stays on your screen and demands a response before it stops. No manual setup per meeting. Your calendar is the source of truth.
Why Calendar Notifications Aren't Alarms
Google Calendar sends a push notification. Outlook sends a push notification. Both appear in your notification tray, compete with hundreds of other alerts, and vanish after a few seconds whether you saw them or not.
This is fine for casual reminders. It is not reliable for meetings where showing up on time actually matters.
The problem isn't that you forgot the meeting. The problem is that the alert fired and nothing forced you to act on it. Notifications inform. They don't interrupt.
Works With Google Calendar
OnTimer connects directly to Google Calendar — personal accounts and Google Workspace. Every event you have scheduled, across every connected Google account, gets an alarm.
You don't create new events. You don't configure reminders. Google Calendar stays exactly as it is. OnTimer runs alongside it and fires the alarm at the right time.
Works With Microsoft 365 & Outlook Calendar
OnTimer also connects to Microsoft 365 and Outlook calendars. If your work schedule lives in Outlook — Teams meetings, client calls, internal standups — OnTimer picks those up and fires alarms for them.
For people juggling both a Google Calendar and an Outlook calendar, OnTimer consolidates both into a single alarm system. You see one set of alarms across all your events.
How OnTimer Turns Events Into Alarms
Connect your calendars
Link Google Calendar, Microsoft 365, or both. Takes under a minute. OAuth — OnTimer never stores your credentials.
OnTimer monitors your schedule
In the background, OnTimer reads your upcoming events and schedules alarms for each one, based on your lead time preference.
A persistent alarm fires before each event
When it's time, an alarm appears on your screen. It does not disappear automatically. It stays until you dismiss it.
No manual setup per meeting. No reminder configuration. Your calendar is the source of truth — OnTimer reads it, and turns every event into an alarm.
Free download · Works with Google & Outlook calendars
Who This Is For
People who miss meetings despite reminders
If you've seen a notification and still missed the meeting, the problem is the notification — not you. Alarms fix this.
Remote workers without office cues
Without hallway conversations or room bookings, there's nothing physical to remind you a meeting is starting. Alarms fill that gap.
People with ADHD or time blindness
Passive notifications don't break through hyperfocus. A persistent alarm that demands dismissal is a categorically different signal.
Multi-calendar users
If your schedule spans Google Calendar and Outlook, OnTimer consolidates both into one alarm system so nothing slips through.
Frequently Asked Questions
Can you turn Google Calendar events into alarms?▾
Not natively — Google Calendar only sends push notifications, which disappear automatically. OnTimer connects to Google Calendar and turns every event into a persistent alarm that stays on your screen until you dismiss it.
Can you turn Outlook calendar events into alarms on iPhone?▾
Microsoft Outlook's built-in reminders are notifications, not alarms. OnTimer connects to Microsoft 365 and Outlook calendars and fires persistent alarms for every scheduled event, replacing dismissible notifications with interruptions that demand a response.
What is the difference between a calendar notification and a calendar alarm?▾
A notification informs you — it appears briefly and disappears whether you act or not. An alarm interrupts you — it stays active and demands acknowledgment before it stops. For meetings that matter, you want alarm behavior, not notification behavior.
Why do I miss meetings even when I have calendar reminders set?▾
Because calendar reminders are notifications, not alarms. They're easy to dismiss accidentally, they disappear on their own, and they compete with dozens of other notifications. If you're in deep work or hyperfocused, they fade into the background without registering.
Does OnTimer work with both Google Calendar and Outlook?▾
Yes. OnTimer connects to Google Calendar (personal and Workspace) and Microsoft 365 / Outlook calendars. Multiple accounts from each provider are supported.
Related Guides
- Why Calendar Notifications Fail (And What Actually Works) →
- Calendar Notifications Not Working? Why Reminders Fail — and What Fixes It →
- Why Notifications Fail (And Persistent Alarms Work Better) →
- The Last 5 Minutes Problem: Why Notifications Fail →
- How to Make Calendar Reminders Persistent →
- Best Calendar Alarm App for Google & Outlook →
- Calendar Notifications vs Alarms: Why Most Reminders Fail →
- Why Calendar Reminders Fail →
- How to Never Miss a Meeting Again →
- ADHD Time Blindness Tools →
Turn your calendar into an alarm system.
Free for iPhone. Works with Google Calendar and Microsoft Outlook.