To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
If you want to keep your money or valuables away from anybody who has more than a half a brain, don’t buy this. I was able to close my eyes and just using my fingertips find the correct numbers and unlock this within 15 seconds.