Tint meter is free app that check car window transparency.
After external and internal illumination measurement the tint meter will show the degree of transparency the automotive glass - vlt (visible light transmission) as a percentage.
To determine the transparency of glass with a film the light sensor of your smartphone is used.
The light sensor is usually located at the top of the screen next to the speaker and the front camera of your device.

Features:
✔ Check vlt (visible light transmission) of car window
✔ No internet connection required
✔ Free to use tint meter