A week ago, his Apple Watch reported A-Fib while he was on vacation in Hawaii. The doctor at the hospital said that the Apple Watch likely saved his life.
Freddie wants to know what's the best smartwatch for checking blood pressure. Leo says that the FCC and FDA haven't approved one yet, though both Amazon and Apple are developing it. When Samsung gets approval, then the Samsung Wear watch will be the one to get. There are several knock-off versions, but Leo says that they aren't that accurate and aren't FDA-approved.
Currently, they only can only measure pulse and oxygen levels, plus heart rate. Leo recommends getting the Omron wrist-mounted blood pressure monitor.