Simple answer: Yes, you can use your Fitbit Charge 3 band on your Charge 4!
Don't we hate to throw away something that is still perfectly good! Finding ways to repurpose, recycle and reuse items is not only a great way to save some money, but also it's better for the environment as it is a means to reducing energy usage/waste. Better yet, this can apply to your Fitbit as well.
If you plan to upgrade your Fitbit Charge 3 to the new Fitbit Charge 4, you'll be able to keep any extra bands you purchased for the 3 for your new tracker and vice versa if you feel had your eye on a specific Fitbit Charge 3 band as Fitbit designed its latest Fitbit Charge 4 activity tracker to use the same bands as the prior generation.
So what is the difference?
If you're wondering if you should upgrade from your Fitbit Charge 3 to the 4 or start with the new model, here are a few key differences. The most notable change is that Fitbit made the move to include built-in GPS - this adds GPS tracking directly to your wrist, which means that you won't need to bring your phone when you head out for a jog or ride to track your workout. No one likes loose things when exercising!
Furthermore, Fitbit also added new tracking systems and software changes that bring Spotify control to your wrist. If you’re a regular runner or gym junkie, the Fitbit Charge 4 is a huge quality of life upgrade that is worthy of your attention.
If you’re looking to grab a Charge 3 band to put onto you your new Fitbit Charge 4, go for it!