Editor's Note: APYs listed in this article are up-to-date as of the time of publication. They may fluctuate (up or down) as the Fed rate changes. CNBC Select will update as changes are made public.

Even if you’ve already settled on Fitbit for your next wearable, it can be difficult to know whether to pick the flagship Charge 5 fitness tracker or the company’s ever-reliable smartwatch, Versa 4.