is there a red iphone App?

[graham.hobart]

Anyone know if there is a red screen iphone app that turns all screens red? Or should I just put some thin cellophane over it!!
Graz

[troypiggo]

I haven't seen one that can change the whole "theme" or display of all apps red, but the only astro-related software I use that would be used at a dark site is Sky Safari, and it has a red night vision mode. Up at Astrofest I noticed a couple of guys with red gel taped over the screen.