Cron

I don't write reviews often, although I have found life changing apps and products on producthunt. Cron falls under one of those life changing apps. Cron's simplicity is what makes it one of the greatest productivity apps I've ever had the pleasure to use. The most simple UX feature (literally sooooo simple) but no one has ever done it in the calendar app side, is the menu bar upcoming calendar events. It gives me a count down to my next calendar appointment, rather than the typical 1 hour warning then 15minute warning. You can also set and share availability like calend.ly. I've tried almost every calendar app there and many different productivity apps. This one has certainly changed my relationship with my calendar!