Fitbit Charge 2 review: inaccurate distance tracking spoils an otherwise good device, which has an improved display and week-long battery life
Lauren Goode / The Verge :
Context & Ripple Effects
Fitbit's review record by late 2016 already had an accuracy problem: Re/code's early-2015 look at three new Fitbits found heart-rate sensor accuracy disappointing in both the Charge HR and Surge, even as battery life kept earning praise. The Blaze earlier that year flipped it — accurate heart tracking but clumsy design and limited software.
The Charge 2 continues that split personality: The Verge credits the improved display and week-long battery while flagging inaccurate distance tracking as the flaw that spoils the device. The question the review leaves open — whether Fitbit can fix sensing without sacrificing battery — is what the next two years of Charge and Versa reviews would answer.
First-order effects
- Buyers choosing within Fitbit's own lineup face a trade-off the company itself created: the Charge 2's week-long battery comes bundled with distance readings reviewers don't trust, pushing accuracy-sensitive users toward pricier alternatives like the GPS-equipped Surge.
Second-order effects
- The accuracy critique lands directly on Fitbit's hardware roadmap — the follow-up Charge 3 is later reviewed with reliable workout tracking, suggesting the distance-tracking complaint became the fix-list for the next generation rather than a one-off defect.
- Meanwhile the cheaper Alta HR ships without GPS and limited exercise tracking, so Fitbit's response to accuracy pressure was to segment: fix reliability at the top of the line, leave basic models thin on sensors.
Third-order effects
- Across four years of reviews, the same axis repeats — battery life praised, sensor fidelity questioned — pointing to a structural reality of the tracker category: multi-week battery and accurate motion/heart sensing pull against each other in hardware design, and each Fitbit generation is essentially a new point on that curve.
The trend: Fitness-tracker reviews from 2015 through 2019 consistently reward Fitbit's battery-life engineering while penalizing sensor accuracy, making each hardware generation a fresh attempt to close that gap without giving up the week-plus charge.