evidence: Understand that this is not an accurate way to check your blood pressure. While these apps are a great idea, the unfortunate news is that their results are not reliable [10] It is considered a "recreational" medical device and is not a legitimate medical instrument that records your blood pressure. Do not use one of these apps and assume that the information provided is accurate or valid. [...] Use a cuff to get a baseline reading. Since cuffless technology is in its infancy, you should take a reading of your blood pressure with an arm cuff before you start taking readings at home without a cuff.[18] [...] - While you can use a wrist cuff to measure your blood pressure, it’s much less accurate than an arm cuff.