No fault of aSmart HUD but I get double vision

I like the idea of this app. Unfortunately on my car the reflection comes off both the front and back surfaces of the windshield, and consequently I get a double image which is mostly unreadable. I would recommend you open something else on your iPhone and put it on your car dashboard at night to see if you also get a double image before you purchase this.

knealy about aSmart HUD