Amazon.com: Customer reviews: Femometer Ovulation Test Strips Kit, 50 LH OPK, Sensitive Fertility Predictor Testing Sticks, Accurate Results with Smart App (iOS & Android) and Can Save All Test Strip Result
Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
simple to use and seems accurate. i took multiple tests each day to see how my LH levels went down and they did. also downloaded the app which is a great. it tells you if the line is considered Peak, high or low.