Best Selling Smartphone Blood Pressure App Gave Wrong Results

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Best Selling Smartphone Blood Pressure App Gave Wrong Results

The Instant Blood Pressure (IBP) app, which was a best selling health app on both the Apple and Android app stores, employed an unconventional method to estimate blood pressure, pulse transit time. Using a private, unvalidated algorithm, the app calculated a blood pressure measurement when the user put the top edge of the phone on the left side of the chest and the right index finger over the camera.