Is an ovulation predictor kit or basal body temperature a better indicator of ovulation?

OPK vs. BBT. The OPK is usually much easier to use and interpret than the bbt, and in many cases will be more reliable as well.
OPK. Both are good, but the ovulation predictor is a bit more objective and easier to interpret. Best to do both, though having regular intercourse every other day probably yields better pregnancy rates.