I would love the option to turn on cute immersive sound effects— similar to the Fabulous App. Sound helps me feel rewarded for using apps and gets me in a certain focused mindset.
When I finally get into focus mode, I miss when the Opal session has ended, when the break started, when the break is over, etc. I have all notifications on so I do get a banner but the point is NOT to look at my phone. Would be great to set it, put the phone aside, then wait for the gentle ding (or sound of your choice) to let you know your session is over with probably a different sound for a break start/break over.
Choose a notification sound that isn’t so easy to miss or allow us to pick our own sound. I never hear my phone when I’m supposed to start something and I end missing it. If possible, have the notification stick around longer too, like I have to clear it from my screen and watch before it disappears.