The most affordable option I found for this type of test, clearly worth trying compared to the pharmacy tests that are very expensive and have very few pieces.

The most economical solution for an ovulation test and equally effective as commercial devices. It takes a few seconds longer than the instructions say!

I used them for about six months until I saw when my fertile days are due to my long cycle, and they helped me a lot. Every time it showed a specific day of the cycle and after six months of use, I consider them reliable.