OnTimer - Never be late

OnTimer - Never be late

Automatic calendar alarms

12 ratings
11 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 3, 2026
  • July 8, 2026

Features

OnTimer - Never be late screenshot #1 for iPhone
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OnTimer - Never be late screenshot #5 for iPhone
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OnTimer - Never be late screenshot #7 for iPhone
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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

Version 1.2.2 Build 42

July 8, 2026

Never be late again—now with Apple Calendar support and even easier onboarding. OnTimer now supports Apple Calendar, so you can connect Google, Microsoft, or Apple Calendar and automatically stay on time. What's new in 1.2.1 - Apple Calendar support - Faster calendar setup - Improved alarm reliability - Performance and stability improvements Never be late again.

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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

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.

Keeps me sane

My coworkers no longer harass me for being late

Good stuff!

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

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

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.