Can't add Charge 5 and Pixel Watch 2 on the same account

[dianasmith]

When I attempt to add Pixel Watch 2 to the fitbit app, it says it will replace the Charge 5 on the app.  Is there any way to have both?  Even if I have to switch email accounts?  Only it must be on the same Android phone

Moderator Edit: Clarified subject

[gdio53 · Accepted solution]

@dianasmith 

You can only have 1 device that uses the Fitbit Gallery attached to your phone and account at a time.

I also have both of those devices and swap them every night when the PW2 needs charging, It's very quick and almost painless, The charge 5 takes a little bit longer because you have to enter the code into the app, and there's additional prompts to acknowledge. Swapping back to the PW2 is almost Instantaneous.
If you were to use a second email account, you'd have to log out of the app and log in using the other email, which takes more time and the activity on 1 account would be separate from the other and you'd have to manually add them together to get the total picture of your activity.