Fast and accurate detection of possible traces is of vital importance!
Don’t rate 1 star before you read the description!!!
When to use UV light to detect blood:
• Reduce the risk of collecting unnecessary stains
• Detect blood on dark, red or violet surfaces
• Find blood stains that are concealed by paint
Change frequency to get different tones and better visibility of a stain!
This app might not work on all devices because not all devices can produce UV light properly.
Download apk file for your android phone: https://goo.gl/UGddEt