Are chess clocks overpriced?

My guess is...........you do not make chess clocks in quantities like you do watches.  It is the high quantity that lowers the price.  

Depends on what you mean by "over priced"  If you dont play chess, then yes.  If you love to play chess, travel to tournmanets, etc. Then no.  I have pretty much had every clock there is from the basic cheap plastic ones to the Chronos touch sensor model.  My favorite is the Chronos Touch Sensor model, but to be honest.  Nothing beats a good old fashioned BHB analog chess clock.  I still kinda miss the days of hearing all those analog clocks and there "tick tick tick"

Playing speed chess on an analog clock was the best.  We would hit that clock so hard trying to get the flag to fall.  

               Try playing a timed game using 2 sundials. May be difficult on a cloudy day....!

In my experience , phones just don't work well as chess clocks.  Yes, they can work in a pinch, but it's slow and hard to read.

digital clocks high profit.  mechanical clocks are probably not overpriced, when compared to mechanical watches.  They're harder and costlier to make properly.

Mechanical clocks are harder in many ways.  But when you can not mass produce something it brings up the cost per unit.  Many electronic components that are common you do not get a price break unless you buy 1K or 10K or 100K in some cases.  If you are ordering  PCB or PWB for the clock and everyone has one and you only order 100 you are paying a lot. I used to get quotes on PCB's single later up to many and you could usually buy 1K boards for a lot less per unit than 50 or 100 boards.  You also have NRE (on-recurring engineering) when they make a new board for you that you can amortize among 1K units vs 100 units, then you can get the prices much lower.

You may think there is a lot of profit in the digitals but there really isn't.  Tournament Chess is still not a popular hobby, 

no

No

Your desire for attention is an old act.

No, you can't use a phone for a clock in a tournament.  And the main reasons phones are worse than chess clocks is that chess clocks are built for stability and readability, and tactile feedback.  Hitting a clock button gives much better feedback which leads to a more comfortable experience -- there is no insecurity about whether your "touch" registered, there's no wondering if you accidentally swiped instead of tapped, pulling down a menu, there's no hoping you don't get interrupted by a phone call, etc.  Also, phones can and will slide all over the place during a time scramble, and no one wants to deal with what happens when you lunge for the phone after a move trying to get to it before the flag falls and knock it across the room.

There are just way too many issues with using a phone.