For me personally, it made it easier to get out of bed, but it didn't make me feel more awake. It lessened the struggle, but I (not a blind test or hard data) feel like it sometimes made me feel less awake all morning. This made me pay more attention to sleeping multiples of 1.5 hours instead of just any amount, which helped a bit, and which I still do today (conversely, I haven't used the light in years, though I was recently thinking about it again).
Overall, I would recommend to try it, but it was pretty expensive so having 14 days (as one does when buying online in the EU) to return it and get your money back is recommendable as well.
Edit: this looks like a second iteration of the model I had: https://ic.tweakimg.net/ext/i/1289910640.jpeg
It actually works really well for me. I feel great in the morning and the rest of the day too. I did not have very healthy hours before, though.
Not sure about iOS.