Prime Big Deal Days bring deals on Fitbit Charge 6 and Sense 2

Amazon's Prime Big Deal Days sales this week have pushed several popular fitness trackers into steep discounts, offering buyers a chance to buy advanced wearable health devices at reduced prices as the market for such products continues to grow. Retail listings for the promotion show the Fitbit Charge 6 marked down to prices as low as $99.99 on some listings and $119.95 on others, while an earlier-generation model, the Fitbit Sense 2, has appeared in other retail promotions for just under $200.

The Charge 6 is positioned as a hybrid fitness tracker with built-in GPS and a suite of health features that include an electrocardiogram function, blood oxygen monitoring, sleep and stress tracking, and VO2 max estimates. The device also supports Google Wallet and a range of smartphone notifications, though it does not permit full message replies or in-watch calls. The Sense 2 retains a broader smartwatch posture with all-day stress detection, ECG and SpO2 metrics, built-in GPS for workouts, an OLED display and manufacturer-stated battery life of up to six days.

Shoppers deciding whether to buy during these sales should consider how they plan to use a tracker. Entry-level bands and...