This app offers a browser with a yellow tint. There are some problems with this:
1. The keyboard still shines the usual blue light every time you try to type something.
2. Anything in black looks gray, like text or shadows, making it harder to read/see.
3. The yellow tint only appears on the browser, not on other apps.
It would be nice if there was an app that made everything on the screen tinted, but apparently that cant be done on the iPhone yet.
MechanicalThunders about Unblue