which brand of ovulation test are you using

Christina
Hi ladies, 
We are TTC with 2nd child. Which brand of ovulation test are you using and found it working and affordable? I have been testing with clearblue digital ovulation test for a year or so ( not every month though ) aroudn the suggested ovulation day, but never got positive. I am not sure if the timing was not good. Also, the digital one seems pretty pricy if plan to test every month. 
With my first child(he is now 5), I remember I used non-digital one, it was very straightforward, but I cannt remember which brand. 
Could you suggest which brand that you find is good? Very much appreciated.