I use the Premom app and these or the Premom test strips!
Under Yours Easy@Home 50 Ovulation Test Strips and 20 Pregnancy Test Strips Combo Kit, (50 LH + 20 HCG)-Package May Vary - Easy@Home 50 Ovulation Test Strips and 20 Pregnancy Test Strips Combo Kit, (50 LH + 20 HCG)-Package May Vary