Fitbit Charge 4
Advanced fitness tracker + GPS
Fitbit Charge 4 launched on March 31, 2020 with 71 votes, #677 of 4,417 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 6 years on.
What it does
A health & fitness tracker that introduces Active Zone Minutes to take fitness tracking way beyond 10,000 steps, personalized heart rate features, sleep tracking, built-in GPS, Spotify control, payments, and into a comfortable wristband with 7 day battery.
Does a similar job
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Fitbit Charge 32018 · store.google.com · ▲80Best selling fitness tracker adds swimtracking & touchscreen
Heart Rate Zones Plus – The first iOS app I developed2025 · apps.apple.com · ▲100I built this iOS app because I wanted to get an overview of my time in zones per week without checking zones after every workout manually - Now I'm looking for feedback. Description: Track time in heart rate zones. Track per day, week, month, 7 days and 30 days time period and how much time you spend in each zone. Set goals & visualize progress. Get details about heart rates zones of your workouts. Features: Custom time periods, Workout to zone attribution to get a feeling which sport attributed most to each zone, Multiple zone calculation methods, Set personal time goals for any zone,…
Google Fitbit Edge14d ago · blog.google · ▲95Google’s smartest fitness tracker ever with 7-day battery

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