I am also on my smartphone and computer a lot throughout the day. Vision problems got to the point where my eyes were watering, blurring, and I had an occasional headache towards the end of the night. I was increasing font just to read. I rested my eyes from my usual activity for about a week, which drove me crazy.
After trying these out for just a day, I had noticed a significant difference. The feeling of eyestrain was significantly reduced. Now, after wearing these glasses for about a week, the eyestrain is gone and I am able to look at my devices for an extended period of time without any problems. I like these glasses so much.