Smart watch on wrist closeup

Closeup of a smart watch on a wrist highlights modern design and health monitoring features, heart rate tracking, and integrated GPS.

About this subject

Smart watches have evolved from simple tech accessories to essential health and productivity devices. Current models such as the Apple Watch Series 9, Samsung Galaxy Watch 6, and Garmin Venu 3 feature optical heart rate sensors, electrocardiogram (ECG), and pulse oximeters. Integration with smartphones enables notifications, contactless payments, and music control. Battery life ranges from 18 hours to 14 days, depending on model and usage. Water resistance (typically 5 ATM or IP68) allows use during swimming. In Brazil, the smart watch market grew 45% in 2023, with prices ranging from R$ 200 to R$ 8,000. Wearables also aid in monitoring chronic diseases like diabetes and hypertension through apps certified by Anvisa. The AMOLED screen, present in many models, ensures outdoor visibility and power efficiency. Silicone straps are the most common, but leather, metal, and fabric options are available for different occasions.

Frequently Asked Questions

What is the difference between a smart watch and a fitness tracker?

Smart watches offer a full operating system with apps, calls, and notifications, while fitness trackers focus solely on physical activity and health. Smart watches generally have larger screens and more features.

Does a smart watch need a data plan?

No. Most work via Bluetooth paired with a phone. Some models with eSIM allow standalone calls and internet but require a carrier data plan.

Can a smart watch measure blood pressure?

Yes, some models like the Samsung Galaxy Watch 6 and Huawei Watch D have a blood pressure sensor, but they need to be calibrated regularly with a traditional monitor.