You don’t want to water daily normally. You want to water a little longer and let the water soak into the ground allowing the grass roots to grow deeper down. That’ll make for a better lawn and use less water. Generally you want to have it water in the early morning so the water has a chance to soak into the ground, and not evaporate in the heat. You also don’t really want to water in the evening as that’s not good either. Your grass will get watered more when it’s Hot out, and water a lot less in the winter. My Rachio didn’t water my lawn once this last December. I’m north of S.F. Not like there is any Snow or rain every day. It’s temp, and now much moisture the Rachio thinks is in the ground and water else. My lawn sections normally get around 23 minutes each on the days my lawn is watered.
Before you were doing every other day for 10 minutes. So say that’s 30 minutes a week. So 40 minutes for 1 or 2 days a week is not really crazy if you think about it. Again, less daily watering, and more into longer but less days watering. Making for stronger lawn roots as they have to go deeper and less weeds. Deeper where there is still moisture in the ground.
Keep a eye out on your lawn and make sure it’s not dying or something. Check out how the Rachio is watering your lawn once in a while as it adjusts its self.