Fitness tracker: Smaller, longer battery (1-2 weeks), focused on health. Smartwatch: Bigger screen, apps, notifications, but 1-3 day battery. If you mainly want fitness data — a tracker is better and cheaper.
Xiaomi Smart Band 9 Pro at $69 — GPS, AMOLED, 2-week battery for $69 is unbeatable value.
Best overall tracker — Google Wallet + GPS
Best value — AMOLED, GPS, 2 weeks battery
Best for Samsung — sleek AMOLED
Most features for the price — 120 workout modes
Best for athletes — no screen, pure data