Light in the sky

Driving West I saw what I thought was a planet and thought to myself, wow what planet is that? And pulled out my phone to check an app I have that shows current planets in the sky. The what I thought was a bright planet or star then disappeared completely. It reappeared and flew south then flickered in and out. It stopped and you could see if very slightly then it disappeared completely. I couldn’t believe it. It was bright outside too, it clearly knew it was getting too bright to pose as a star so it had to go invisible. PS it was a completely clear sky. No clouds.