Fitbit FB503WTGY Ionic Fitness Watch, Blue Gray/Silver Gray

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FitbitSKU: FB503WTGY

Sale price$284.99 Regular price$359.99
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  • Condition: New
    This product is brand new with a full manufacturer warranty
  • Warranty: 90 Day Manufacturer Warranty


Fitbit FB503WTGY Ionic Fitness Watch, Blue Gray/Silver Gray


The Fitbit Ionic is a feature-packed wearable that provides fitness guidance, health insights, music storage, and much more. This sleek-looking timepiece comes with a 1.42" color touchscreen and features a blue gray band with a silver gray case. In terms of fitness tracking, the Ionic offers both multi-sport functionality and traditional all-day activity tracking. Complementing these modes are the Ionic's sophisticated array of sensors, which include an optical heart rate monitor, built-in GPS, 3-axis accelerometer, altimeter, and more-all working to provide you with the most accurate health data possible. Beyond its fitness functionality, the Ionic offers plenty of everyday features, including smartphone notifications and alerts, contactless payment option, sleep monitoring, and more. If you're a Pandora user, you can even store songs locally on the Ionic and listen to them with a compatible pair of Bluetooth headphones. The Ionic is designed to be both durable and water-resistant, so you can take it in the pool, the shower, or out in the rain. Its built-in battery provides up to 10 hours of tracking in GPS mode, meaning you'll be covered even during your longest workout sessions. Large and small interchangeable bands are included with your Ionic, as well as a charging cable.

Dynamic Personal Coaching

Get personal coaching straight from your wrist that includes on-screen guidance and routines that change and adapt based on your feedback.

PurePulse Heart Rate

The Ionic utilizes PurePulse technology to deliver continuous, automatic, wrist-based heart rate data.

Built-In GPS

Built-in GPS lets you see precise pace, distance, and other key stats, while recording elevation climbed, split times, and ever a map of your route.

Store & Play Music

Use Pandora with your Ionic to store and play songs on your watch.


The Ionic features a water-resistant design, so you can safely wear it in the pool, shower, or rain.

Multi-Day Battery

Get up to 10 hours of battery in GPS mode, so you can track day to night on a single full charge.

Multi-Sport Modes

Track specific workouts in modes like running, cycling, or lifting weights and get real-time data feedback and post-workout summaries.

All-Day Activity Tracking

Monitor your steps, heart rate, distance, calories burned, floors climbed, active minutes, hourly activity, and stationary time.

Smartphone Notifications

With the Ionic you can see call, text, and calendar notifications on screen and also get push notifications from your favorite apps.


Use the SmartTrack features to automatically record select exercises and send your data to the Fitbit app.


Thanks to Ionic's integrated NFC chip, you can use your credit and debit cards anywhere that accepts contactless payments.

Popular Apps

Ionic supports all your favorite apps. Get instant access to important information like weather or sports, as well as many other popular applications.

Syncs Wirelessly

Thanks to built-in Bluetooth, the Ionic can sync stats wirelessly to any compatible computer or device.

Sleep Stages & Insights

See your time spent in light, deep, and REM sleep stages, and get personalized insights to help you improve.


Watch Operating System Proprietary OS
Compatible Operating System Android 4.4 and later
  iOS 5 and later
Sensors Accelerometer, Altimeter, Gyroscope, Heart Rate, Light Sensor
Activity Tracker Yes
Microphone No
Built-In Speaker No
Vibration Yes
Connectivity Bluetooth, Wi-Fi, NFC
Wireless Range 30' / 9.1 m
Bluetooth Protocol Bluetooth LE
Bluetooth 4
Wi-Fi Wi-Fi 4 (802.11n)
Dial Shape Rectangle
Dial Size 1.42" / 36.1 mm
Dial Type Digital
Display Technology LCD
Display Resolution 3482 x 250
Backlight No
Battery Type Lithium-ion polymer
Battery Life GPS: Up to 10 hours
  Normal Use: Up to 4 days
Battery Charging Time 0 to 2 Hours
Case Materials Aluminum
Water Rating 5 ATM
Band Material Flexible Elastomer
Wrist Size Fits wrists 5.5 to 8.1" / 139.7 to 205.7 mm
Case Dimensions 1.15 x 0.83 x 1.42" / 29.21 x 21.08 x 36.07 mm
Packaging Info
Package Weight 0.66 lb
Box Dimensions (LxWxH) 8.7 x 4.05 x 1.85"

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