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OnTimer - Never be late

OnTimer - Never be late

Automatic calendar alarms

16 ratings
11 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 3, 2026
  • August 21, 2026

Features

Developer

Ethan Garr
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About

This app automatically creates persistent alarms for all your calendar events, ensuring you never miss a meeting. It also provides departure time alerts for in-person meetings based on real-time traffic conditions.

✓Automatic calendar event alarms
✓Persistent, non-dismissible notifications
✓Time to leave alerts with traffic
✓Customizable transportation modes
✓Recurring event controls
✓Do Not Disturb integration
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What's New in OnTimer

1.2.8 Build 48 - Share Ontimer, Better Cards

August 21, 2026

Get OnTimer's latest so you're never late. Event cards now give you even more control — turn Early Warning on or off for just one event, independent of your default setting, with a cleaner, easier-to-read layout for your Primary Alarm, Early Warning, and Location. We added a Share option on the Settings screen. If OnTimer's helping you stay on time, tell a friend and help spread the word. We also fixed a few issues around event modifications — when you change an event on your calendar, OnTimer now catches up faster and more reliably. Managing your subscription is easier too, with a new self-service screen for changes. And we've added built-in Help & Troubleshooting docs, right from Settings → Help & Support, that we'll keep improving over time.

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Subscription plans

OnTimer Pro (Yearly)

Unlock Pro features including multiple calendar syncing

$49.991 Year
7 Days trial
How to cancel OnTimer subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

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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DaJackHammahDaJackHammah

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.
YuriyYarovoyYuriyYarovoy

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
nickgdwnnickgdwn

Good stuff!

Simple to use, effective, and fills a niche. Good stuff!
92627 Whomper92627 Whomper

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!
Taudio9Taudio9
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FAQ

How does OnTimer create alarms for calendar events?

OnTimer connects to your Google or Microsoft calendar and automatically generates persistent alarms for each event. These alarms remain visible and audible until dismissed, unlike standard notifications.

Does OnTimer have ads?

No, OnTimer does not contain advertisements. The app is free to use with optional paid features.

What is the pricing for OnTimer's paid features?

Paid features are available through monthly and annual subscription plans. A 7-day free trial is offered on the annual plan.

Can OnTimer help with in-person meeting travel?

Yes, OnTimer offers 'Time to Leave' alerts that calculate your departure time based on real-time traffic and your chosen transportation mode, ensuring you arrive on time.

What devices does OnTimer support?

OnTimer is currently available for iPhone devices.

How often is OnTimer updated?

The latest version, 1.1.2 (35), was released on March 25, 2026, indicating regular updates to improve functionality and reliability.

What are the benefits of the paid version of OnTimer?

The paid version allows connection to multiple calendars (Google and Microsoft), supports multiple accounts, includes business hours filtering, and enables 'Time to Leave' alerts with real-time traffic and customizable travel settings.

What is the age rating for OnTimer?

OnTimer has an age rating of 4+, making it suitable for a wide range of users.