OnTimer: Calendar Alarm

OnTimer: Calendar Alarm

Meeting Reminders That Ring

25 ratings
11 reviews
Free
In-App Purchases

Details

Released
March 3, 2026
Updated
November 5, 2026

Features

OnTimer: Calendar Alarm screenshot #1 for iPhone
OnTimer: Calendar Alarm screenshot #2 for iPhone
OnTimer: Calendar Alarm screenshot #3 for iPhone
OnTimer: Calendar Alarm screenshot #4 for iPhone
OnTimer: Calendar Alarm screenshot #5 for iPhone
OnTimer: Calendar Alarm screenshot #6 for iPhone
OnTimer: Calendar Alarm screenshot #7 for iPhone
OnTimer: Calendar Alarm screenshot #8 for iPhone
OnTimer: Calendar Alarm screenshot #9 for iPhone
OnTimer: Calendar Alarm screenshot #10 for iPhone
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About

This app transforms calendar notifications into persistent alarms, ensuring you never miss important events like meetings or flights. It offers smart alerts for travel, customizable sounds, and integrates with your existing calendars to keep you on track.

✓Persistent calendar alarms
✓Time to Leave alerts with traffic
✓Time to Fly airport alarms
✓Customizable alarm sounds
✓Integration with Google, Outlook, Apple Calendars
✓Snooze functionality
✓High Alert through Silent/Focus modes
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What's New in OnTimer

1.2.25

November 5, 2026

Need a few more minutes? Snooze an alarm and let OnTimer remind you again. You can also import a sound you recognize instantly and use it for calendar alarms, Time to Leave, Time to Fly, or an individual event. When multiple events need your attention at the same time, OnTimer brings them together in one clear alarm. Your schedule. Your sound. Your timing.

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Subscriptions & In-App Purchases

OnTimer Pro (Monthly)

Unlock Pro features including multiple calendar syncing

$7.991 Month
How to cancel OnTimer subscription ⁉️

Events

Read more about Time to Fly

Time to Fly

Know exactly when to leave for the airport.

Nov 9, 2026 — Dec 10, 2026

User reviews

The Missing Link Between My AI and My Day

I use Claude to plan my entire schedule. Meds, training, client calls, wind down, all of it. Claude writes the day to my Google Calendar and that used to be where the system broke, because iOS calendar notifications are useless. Quiet banners you swipe away without looking. I had a perfect schedule sitting in my calendar and still missed half of it. OnTimer fixed it.

It reads my calendar and automatically creates a real alarm for every event. Not a notification. A loud alarm that actually cuts through. I don’t build alarms manually. I don’t maintain two systems. Claude writes the plan, OnTimer turns it into sound, and I just live my day. If you searched “Google Calendar to iPhone alarm,” “convert calendar to alarms,” “AI calendar alarm,” “Claude calendar sync,” or “ADHD calendar alarm app,” this is it.

The developer is also a real human (I won’t say his name for privacy) who actually cares. Responsive, fast, works the problem with you, ships fixes. Almost extinct in the App Store right now. Setup took two minutes. Loud alarms. Customizable lead time. If you use AI to plan your life and you’re on iPhone, OnTimer is the piece that closes the loop.
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Keeps me on time

My grandfather always told me that if you’re on time, you’re five minutes late. Ontimer make sure that I’m never on time but rather early and impress my meeting.

Response from developer

Glad you are finding it useful and let us know if we can make it better.

Keeps me sane

My coworkers no longer harass me for being late

Good stuff!

Simple to use, effective, and fills a niche. Good stuff!

Response from developer

Thanks Whomper! Appreciate that you are getting value from this. Let us know if we can make it better!

Stay On Time with On Timer

Simple, elegant, easy to setup and use. Especially like the new time to leave feature. Helps me stay on time all the time!

FAQ

What is OnTimer?

OnTimer transforms your calendar events into persistent alarms, ensuring you don't miss meetings or flights. It syncs with your Google, Outlook, or Apple Calendar to provide timely alerts.

How does OnTimer handle flight reminders?

OnTimer automatically creates 'Time to Fly' alarms for flights on your calendar, factoring in recommended arrival times and your travel details like drive time and bag check. It recognizes airport codes in event locations.

Can I use my own alarm sounds with OnTimer?

Yes, OnTimer allows you to import and use your own custom alarm sounds for a more personalized experience. You can also choose from a selection of built-in sounds.

Does OnTimer have ads?

No, OnTimer does not contain advertisements. The app offers a free tier with core features and a premium subscription for advanced functionality.

What are the premium features of OnTimer?

Premium features include connecting multiple calendars, live traffic updates for 'Time to Leave' and 'Time to Fly' alerts, early warning notifications, custom alarm timing, and unlimited snoozing.

How does OnTimer's 'Time to Leave' alert work?

The 'Time to Leave' alert considers current traffic conditions and your chosen travel mode to tell you the optimal time to depart for events with a location. You can also add a departure buffer.

What devices is OnTimer available on?

Based on the provided data, OnTimer is available on iPhone.

How often is OnTimer updated?

The latest version of OnTimer was released on 2026-11-05, indicating regular updates to improve functionality and reliability.