InfraredCamera 4+

This app works great! But only if you light (only a little light). If you only a tiny dot, it won't work. If you don't have any light, you still out of luck.
It will show two images, the first one is called "Original" image (the picture you took), and the second is "Infrared" image.  10:54.

I thought I'd give this app a try, so I installed it.
Oh, it installed and opened just fine.

Problem was, in the course of taking one photo, I was visually and audibly assaulted by the ads. All three of them.

Think for a moment... This is an app for taking photos in the dark, right? So why must I be bombarded with three full volume ads with white color background? Stupidest thing I've ever seen if I'm out at night taking pictures, chances are I want to move about quietly and not be blinded by my phones screen.

If you must use ads in your app because you're simply not making enough money from the meta data you're collecting (I get it, you're greedy), then at the very least use some common sense when selecting the ads you show and have them be in dark mode or something. That's all.

Oh! This app was on my phone for a total of 1 minute. It was deleted as fast as it installed

Let's begin that the developer is extremely honest in his claims! The iPhone camera does not have any capacity to enhance/amplify light---at any spectrum, or as a 1st, 2nd, 3rd, and 4th generation IR scope. The developer explicitly stated that it's the algorithm that collates whatever light pixels the iPhone lens managed to capture and dumps them in a B&W image. If NO light is captured ditto for the algorithm... Tried it in the bathroom, with hallway light on and took about six shots, with the door at various stages (from almost closed, to wide open). Well the developer is thruthful! The regular image is almost black, while the B&W grainy image shows you what's there! (the resolution between a 1st Gen. Starlight scope (minus the green)
USES? Ummm, don't know, other than taking a pic of the license plate of a suspect's car at night without being seen by the flash!
CAUTION: For ALL of you 007 wannabes! The applet defaults in flash, so remember to turn it off or else... Bang! You are dead!
CONCLUSION: I'll keep it; it might come up handy one day (umm... night). Com'on! It's free, so Thanks developer!