This Device could turn your iPhone into a Night vision scope. Wait we're not gonna talk about a special night vision apps for your iPhone but it's a USNV Night Vision iPhone Adapter.
This cool Night vision Adapter will bridge your iPhone with the actual Night vision scope to leverate your iPhone features such as the Video recording, Geo tagging and messaging. The NViA slides onto the iPhone and connects with a variety of night vision and thermal imaging devices with a threaded mount. Once installed, the iPhone gives you a larger night vision display and allows you to record video and photos, zoom and adjust optic settings, geo-tag your footage, and send images to others. It seems that the potential users of this NviA is sportsmen, surveillance professionals and broadcasters.
Like anything night vision, the iPhone Adapter isn't exactly cheap. It costs $269, and that's before you factor in the cost of the night vision scope or iPhone itself. It's currently offered free with the purchase of specific night vision goggles and scopes, but both of those cost more than $3,500. That might not be bad if you rely on night vision for your profession, but it's a little prohibitive for the hobbyist that just thinks it'd be cool to watch night vision on his iPhone.
How about the compatibility? According to the sources from Night Vision Experts The NViA is compatible with iPhone 4 and 4s models