Hi
It's possible to link the tracker to the account using a computer / mac or with the phone.
Feel free to check out the Fitbit Article:
How do I set up my Fitbit device?
No desktop needed unless you want to load music onto your Ionic.
Not sure what you mean by " when you setting up your fitbit account it's searching for desktop ", since it does not.
You don't need to use a computer's USB port to charge your Ionic, you can also use a phone's charger that has a USB port.
Best AnswerI used a desktop for setting up my Ionic because I find it less cumbersome. That being said, you don't need one to set it up.
Kristen | USA Cruising through the Lifestyle Forums
one cruise ship at a time!
Best AnswerI was not able to load my music from my Laptop either, this being such a new product must still have a few bugs