Fitbit will soon be able to save people's lives by detecting any irregularities in their heartbeat. The San Francisco-based consumer electronics company has recently received approval from the US Food and Drugs Authority (FDA) for a new algorithm that detects and analyzes heartbeat irregularities. The feature can give users an early warning sign for potentially fatal diseases. Fitbit applied for the approval in March and now that it has received it, the company is free to release a new smartwatch with this functionality. However, since it does not have approvals from other countries, the feature might be region-locked outside of the US.