Are smart scale body fat readings actually accurate?

The consensus across fitness subreddits like r/Fitness, r/loseit, and r/workout is that bioimpedance body-fat readings from consumer scales are unreliable in absolute terms but can be useful for trend-tracking if you weigh under consistent conditions. Multiple Reddit posters who compared smart-scale readings to DEXA scans report large discrepancies. If absolute body-fat accuracy matters, expect to need DEXA or a clinical BIA device.