Just bought the FR triple check box, might take one of them later on today. Which one is best for early testing?

All three are good. The first response early results and digital can detect HCG as low at 6. I can't remember what the rapid response is good at but if the other two are positive it should be also. I did the triple check box at the very beginning of my last pregnancy. My hcg was at 13 if I remember correctly from the blood draw.