Horizon: Calendar Highlights is free on App Store

Horizon: Calendar Highlights is a calendar app from a solo developer, and it's free on the App Store for iOS and watchOS. It usually costs $2.99 as a one-time purchase. It has no subscription and no in-app purchases.

Horizon works on top of Apple Calendar, so iCloud, Google, Outlook and Exchange calendars all show up. It puts each event into a category such as Work, Health, Family or Travel. The sorting runs on your phone, using Apple's on-device foundation model and a classifier the developer trained. It suits anyone with a busy calendar who wants to see where their time goes at a glance.

The developer says the free price runs through November 30. If you claim it before then, it stays in your App Store purchase history, so you can download it again later at no cost.