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As of my last knowledge update in January 2022, I don't have real-time information on the latest Fitbit models.

Fitbit regularly releases new models and updates, so it's essential to check for the most recent reviews and product releases.

As of my last update, some popular Fitbit models included:  Fitbit Charge 5: A fitness and health tracker with advanced features like ECG(Electrocardiogram),

EDA (Electrodermal Activity), built-in GPS, sleep tracking, and a color AMOLED display.  Fitbit Luxe: A more stylish fitness tracker with a metal case, AMOLED display, heart rate monitoring, sleep tracking, and stress management features. 

Fitbit Sense: A more advanced smartwatch that includes health features such as ECG, EDA, skin temperature tracking, stress management tools, built-in GPS, and compatibility with a variety of apps. 

Fitbit Inspire 2: An entry-level fitness tracker with basic health and fitness features, including heart rate monitoring, sleep tracking, and guided breathing sessions. 

When choosing the best Fitbit for you, consider your specific needs, preferences, and budget. Think about the features that matter most to you, such as fitness tracking, heart rate monitoring, sleep analysis, or smartwatch capabilities.

Also, be sure to check for any newer models that may have been released since my last update. 

For the most up-to-date information, reviews, and comparisons, I recommend checking Fitbit's official website and reading recent product reviews from reputable sources.