Provides the advertised functionality under certain conditions, but crashes a lot. In my brief testing, I found that this app is pretty effective for getting more detail from outdoor images at night with the camera mounted or held very still. In a side by side comparison with the built-in camera of my iPhone 8 at full exposure, Night Eyes shows much better detail by moonlight (it’s a crescent moon as I write, having just tried the app). However... in pitch black conditions, you won’t get anything but noise, and in only moderately low light conditions (like a street light), the iPhone does better. Mode 1 is very grainy; Mode 2 lags a lot, but this is where the app shows its power in squeezing out much more detail from the darker portions of the camera image. Mode 3 is even more laggy, and doesn’t seem much better than Mode 2. Of course, the free version is ad supported, but they aren’t especially intrusive; you just have to click through one ad when you launch. The crashing seems to happen mostly when you try to switch apps without closing Night Vision first. It’s a resource-intensive app, with very specific uses. If you keep that in mind, you’ll probably be happy with it.