[frizensami]

Agreed, and a very valid point that these off the shelf detectors are pretty cheap compared to ToF smartphones. There are a number of unfavourable things about the detectors though:

- No automated detection, so lots of human subjectiveness on whether a bright spot should be investigated

- Background lighting can be an issue, so the view through the detector can be filled with bright reflections

- When I tried this for longer than 30 seconds, there's really some eye strain involved

The idea is that the smartphone has more than this one purpose, and the detection system can improve with software updates, whereas you get what you see with the detector and nothing more.