I’ve got a few on my phone:

• one for playing a sound when my phone is charged
• another for starting my Streaks timer when certain reading apps are opened, so that I can track how long I read every day across apps automatically
• when my Sleep schedule begins (when I’m going to bed), I automatically change the screen colour to grey to help prevent being distracted. When I wake up, it turns that off.
• I have one HomePod, and I don’t use it much, but it has a temperature sensor and when that goes over 25C I get a notification so I know to turn on the AC

I’ve been using Kagi for the last year, and when that’s not available, duck duck go or starpage. Kagi is excellent. yes its paid, but imo worth the cost.