A lot of people just use the shop analyzer for convenience rather than getting their personal one out of their car.
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I have my own oxygen analyser and my own helium analyser.
I don't like the poll options.
I own an analyzer but use the shop one 99% of the time.
I have a great idea. Let's remove the poll option altogether. TJ hates polls anyway :-D
I use my own analyzers every dive, even with trusted sources, just as a habit so that it's routine for when I use an unfamiliar source.
I really like the polls.
I might use the shop analyzer to quickly check the gas they mixed for total screw-ups, but I will reanalyze before the actual dive.
I have a Palm D O2 analyzer. I like having my own analyzer especially when we travel.
what didn't work for you? Mine has been great... Using it with an iphone but I've heard they had issues on the android. I haven't figured out how to calibrate it without the phone because I've been too lazy to read the manual, but it's worked very well for me so far