Short answer (updated July 2026): No. An old Android phone cannot do infrared "night vision," and no app can give it that — the IR-cut filter sitting on the sensor is physically permanent. But you almost certainly don't need IR. What you need is a small amount of visible light in the room, and then a phone will record a perfectly usable overnight video with its screen off. This guide covers what actually happens in the dark, the numbers that matter, and the five-minute setup that makes it work.
Every week someone asks a version of the same question: I've got an old Pixel in a drawer, I want to point it at the back door overnight — will it see anything?
The honest answer has two halves, and most articles only tell you the flattering one. So here's both.
The half nobody wants to hear: your phone will never have night vision
A dedicated $30 security camera "sees in the dark" using a trick that has nothing to do with a good sensor. It floods the room with near-infrared light — invisible to you, bright as day to the sensor — from a ring of IR LEDs, usually at 850nm or 940nm. Then it captures the reflection.
