An upper arm cuff (the Medisana BU series, Rossmax X models) is considered more reliable for day-to-day tracking, while a wrist monitor such as the Rossmax S150 is handier when travelling — that is where the decision starts. Cuff size matters next: one that is too small or too large distorts the readings, so it is worth measuring your upper arm first. Models marked Connect send readings to a phone app, so there is no paper diary to keep up.
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An upper arm cuff (the Medisana BU series, Rossmax X models) is considered more reliable for day-to-day tracking, while a wrist monitor such as the Rossmax S150 is handier when travelling — that is where the decision starts. Cuff size matters next: one that is too small or too large distorts the readings, so it is worth measuring your upper arm first. Models marked Connect send readings to a phone app, so there is no paper diary to keep up.