Apple removed the calendar app that mined cryptocurrency for not being power efficient

Apple pulled a calendar app from the Mac App Store after it introduced a feature to mine cryptocurrency, as reported by 9to5Mac. The app, Calendar 2, mined a cryptocurrency called Monero in the background, which Apple says put an unnecessary burden on the devices that were using it. After the app’s developer negotiated with Apple and removed the mining aspect, Calendar 2 is now available again in the App Store.
Calendar 2 is supposed to be a bolstered version of Apple’s Calendar app