A thermometer to measure what? Air temperature? Your mouth? Your steak?

Others have already covered this, but the problem is that the phone itself is a source of heat. It wouldn't be a very good thermometer for external usage.

Archer here.

The summary is quite misleading. There a few things to clarify.

The article is discussing a type of mechanical release aid called the "back tension" type. Most release aids used for compound bows have a trigger, activated by either the index finger or the thumb. This gives more control over the shot, but like with firearms, slamming the trigger can cause inaccuracy. The archer doesn't anticipate the "impact", but rather they can prematurely relax, anticipating that the shot has been executed. This leads to a collapse in the arms due to the loss of "back tension" - the muscles used to hold the bow at full draw.

The back tension release does not have a trigger. Instead, it is activated by increasing back tension, in which the archer will expand through the shot. The release aid is designed in such a way that once the hand reaches a certain angle (as a result of the expansion), the string will come off, resulting in a cleaner release that isn't fouled by punching the trigger. It does, however, require very good control of the shot process as the archer cannot consciously decide to release.

This is only done with compound bows. Recurve shooters don't use release aids.