I currently use an Apple Watch to watch notifications, daily activities, reminders, etc. All I need to do is subscribe to that bot. Thanks.

You could add as well like the app Done to see your progress in tracking your habits (like posting, forming a habit, etc)

https://apps.apple.com/us/app/done-a-simple-habit-tracker/id1103961876

P.S. Battery life on an Apple Watch depends on the usage and if you have the latest one, Series 5, you could turn on or off the always-on display and save more battery.