Ovulation Tests? Which one?

[bigbloomerz]

i have a few Ebay Cheapies which I used last month, but I'm not sure if they worked or not. I am temping this month once AF is out the way, and wanting to use an Ovulation Tester. I'm thinking of maybe the clearblu ones, the digital ones.
https://uk.clearblue.com/buy-now#filter_fertility_and_ovulation
any ideas which one is best? they all do different things! Or should i give the cheapies another go.

 

[bigbloomerz]

Anyone?