Night Vision camera

I know my smartphone, like most, don’t have an IR device that can give actual night vision. But I noticed some apps on the web (proprietary ones) that use the right settings to improve a picture taken in very low light conditions. I even tried messing with the configurations of my camera and got it to improve a bit.
Does anyone know of a similar app FLOSS?

Also, if there is any trick that can be used (some filter to apply on the flash or something) I would be happy to hear. Thanks!

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