No, but they are related. Link to Windows (formerly called Your Phone Companion) is the mobile companion app for Microsoft Phone Link (formerly called the Your Phone app).

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And its finally set! If the Phone Companion App is uninstalled on your phone, you may have to go through the same process to link them again. Once you are finished with all these steps ...

In order to process a Phone Link in Windows 11, you need to pair your mobile with your computer. If you do not have the companion app, it is suggested to download it from the corresponding app store.