Alarm Clock Pro
Mac AppsThere are several companies that offer periodic deals on Mac software at huge discounts. I put up with emails from these companies just so that I get notifications when these sales happen. Probably my favorite of these companies is Bundle Hunt. I've been buying from them for over a decade. In their last sale, I got a great app, Alarm Clock Pro, the most full featured clock app I have ever used. It's a vital part of my workflow at my day job. Not only does Alarm Clock Pro alert me at specified times, it also automatically opens a web page to the time clock website my employer uses so that I can punch in or out as appropriate.
You can also have Alarm Clock Pro launch apps at specified times, useful for starting up the file syncing software that backs up my Obsidian vault every morning at 2am. Other features include multiple world clocks, a timer, a stopwatch and scheduling of emails and texts. The alarms can include a custom message in a dialog box or full screen message, custom audio files or music. It will take a photo from a web cam or a screenshot at a specified time. It can log you out, sleep or restart your computer on a schedule. It can even open files and folders at a specified time.
The downside is the price if you don't get it on sale. A monthly subscription is $1.83. A one-time purchase with no upgrades is $29.99 and a lifetime purchase with upgrades is a whopping $119. One upside is that a license includes both the Mac and Windows version of the program if you live that cross-platform life. You can also get an App Store version for $24.99.