Set alerts on calendar events as close as 0 minutes ahead of the event or as long as 99 weeks ahead of the event
•Supports multiple calendars
•Create and edit calendar events from within Custom Alerts
•Everything automatically syncs with the built-in iOS calendar app.

What’s New

Version v2.9

User interface enhancements.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

EZ$$$$$$$$ ,

Works well. Very simple.

This is a simple app that does what it says it'll do. In calendar you have a limited set of times you can remind yourself of an upcoming event. In a way that's convenient so you don't lose focus, but sometimes you want an alert 12 hours ahead of an event and you can't have it in ios. Well with this app you can.

It's very basic, it only does one thing: custom alert times. It doesn't replace your calendar. All it does is modify your event alerts in time increments calendar app doesn't offer but iCal does. This then syncs across all your other devices if you're on iCloud because it's not doing anything funky and your Mac's iCal allows these times anyway. I like it. I needed it forever and this guy made it. Two thumbs up for him!

Peep8 ,

Great app

I love this app, it's such a helping hand for me

Map 989 ,

Calendar alert app does not fully integrate

App allows custom alert settings which are much better than the constraining ones in Calendar, but does not fully integrate: you need to go into i-calendar, find your appointment, then go into the app, pull it up and set alert. Once done your choice will appear in i-calendar, but no adjustments are possible, you need to go back in the app . Very cumbersome, think I will delete it.

Developer Response ,

The newer versions of Custom Alerts support adding and editing events within the app, so you no longer have to go through the cumbersome process of switching between Custom Alerts and Apple’s calendar app.

App Privacy

The developer, Calm Seas Software, LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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