Replace fitbit screen - Exercise & Fitness

most likly replaced

Hi Alan.
not sure if this is what you are asking.
How to sign up for Fitbit in the Fitbit App for iPhone and iPad.

1. Launch Fitbit from your Home screen.
2. Tap Join Fitbit.
3. Scroll through the list and tap on the Fitbit device you have. ...
4. Tap on Set up your Fitbit button.
5. Tap on the Let's Go button.
6. Swipe up or down to set the the big number in the middle to your height.

More items...

How to set up and start using Fitbit for iPhone and iPad ' iMore

https://www.imore.com/how-set-and-start-using-fitbit-iphone-and-ipad
or go to this link.
how to set up my fitbit Google Search

What Fitbit model is it?
If it's a Blaze Ebay has screen replacements. Repair Parts For Fitbit Blaze Watch LCD Display Screen Assembly Touch...

Of course you can do it with a screen protector.
The Guide Of Reset Fitbit Charge HR Complete Guide

You can go to fitbit.com and see about repairs. The screen is not available on the market. You might end up replacing the whole unit.