Connect the calendars you already use
Bring Apple Calendar, Google Calendar, and Outlook calendars together. Microsoft work and school accounts connect through Microsoft 365.
Automatic calendar alarms
Never be late again.
OnTimer turns your calendar events into alarms, so you know when to join, when to leave, and when it is time to act.
Available now for iPhone. Android users can join the waitlist.
“Are you joining?”
The problem is not your calendar
You knew about the meeting. The reminder disappeared.
Schedules change. Traffic builds. A notification appears while you are doing something else. OnTimer closes the gap between knowing what is next and acting on time.
How OnTimer works
Your calendar becomes your alarm system.
Connect once. OnTimer automatically keeps your alarms aligned with your day.
Turn important events into alarms
Get an alarm that demands a response, plus an optional early warning when you need time to wrap up.
Know when it is really time to leave
For events with a location, OnTimer can account for traffic and how you travel. If the road changes, your timing changes too.
Automatic does not mean rigid
Your schedule. Your rules.
Choose recurring meetings, set business hours, pause alerts, and decide how much warning each kind of event deserves.
Download
Need an answer right now?
Start with the moment you are planning.
Use a free planning tool now. When the moment matters every day, let OnTimer keep watch automatically.
The useful details
A few things worth knowing.
OnTimer works with your calendar. It does not ask you to replace it.
What does OnTimer do?
OnTimer turns events from the calendars you already use into alarms on your iPhone. It helps you know when to join, leave, or act before the moment passes.
How is an OnTimer alarm different from a calendar notification?
Calendar notifications can appear once and disappear. OnTimer creates persistent, customizable alarms designed to get your attention when it is time to act.
What is a calendar alarm app?
A calendar alarm app uses events from your existing calendar to create alarms that demand a response. OnTimer adds that alarm layer without asking you to rebuild your schedule.
Which calendars work with OnTimer?
OnTimer connects with Apple Calendar, Google Calendar, and Outlook calendars through Microsoft 365. It works with your existing schedule, so there is nothing new to rebuild.
Does OnTimer know when I should leave?
Yes. Time-to-leave alerts can account for an event location, your travel method, and changing traffic conditions.
What is the Last 5 Minutes Problem?
The Last 5 Minutes Problem is the gap between knowing about an event and acting before it starts. OnTimer helps close that gap with alarms that remain in front of you until you respond.
Does OnTimer work with multiple calendars?
Yes. OnTimer can bring events from multiple Apple, Google, and Microsoft calendar connections into one automatic alarm system.
Is OnTimer free?
Yes. OnTimer is free to download and includes automatic calendar alarms for one calendar. An optional upgrade adds Time To Leave alerts, Early Warning alarms, multiple calendar connections, and more.
Is OnTimer available for Android?
OnTimer is currently available for iPhone. Android users can join the waitlist and be notified when an Android version is ready. Join the Android waitlist.
One less thing to remember
Relax. You are on time.
Turn the calendar you already trust into alarms you will not miss.