Thermal scanner camera app applies a color gradient to the video stream of your build-in camera based on the color intensity of the image.

See everything colored in Thermal Filter Effect Colors like bright things in red/yellow and dark things in blue/green. Use the build in wheel and change the appearance of the colors.

There are multiple color palettes and you can even create your own! Palette presets includes:
Thermal
Mono
Heat map
Fire & Ice
Iron man
Rainbow
Predator
Neon

Features:
Gradient editor
Virtual reality mode (VR)
Camera controls like zoom switch to front face camera flash and off course fast capture.
Selection of multiple color gradients.
Full portrait/landscape support.
Thermo-scan existing photos from your device.
Edited photos can be used as wallpaper or be shared with any method available like to Facebook Instagram or upload to cloud.

Thermal scanner camera allows you to save photos from camera record videos and apply effects on photos from gallery.

Disclaimer: "Thermal scanner camera" is only a simulation of thermal camera and it will not detect a real temperature.
Android phones don't have built-in infrared light sensor or thermal sensor therefore making them unable to detect temperature.