How accurate are ovulation test kits?

Question

I have the clear blue ovulation kit.. 
How accurate are they at predicting ovulation??

Answer

If you start testing on the day it tells you to per your cycle, and if you follow all instructions, then very accurate.
I’ve tested the CB advanced with normal tests, and the CB always detected my surge a few hours before the normal test. Regardless... always came up with a solid smiley same day as when I’d manually read
The advanced one tracks more than one hormone, so it will detect more “fertile days”... I typically get like 4-5 fertile days

Answer

Never worked for me. 
I counted out everything and calculated my ovulation days, to just be on the safe side I took ovulation tests on the days I believed where my days. Every single one came back negative.  Had sex on two of those days and then didn't have sex again and I got pregnant.

Answer

It depends on your cycle really. For me I personally hated the digital. It was constantly flashing all the time for me. I preferred the cheapies from Amazon! But I have friends who used them and they worked great!