Hi @user132; Welcome to the DIY category of the forum.
Suggested reading; DIY School (01 Free Hearing Aid Fitting Software)
Just click any PVC Avatar to find DIY School.
You may ask, “Why read that?”. Because ReSound’s Smart Fit is readily available from a GN ReSound website, that’s why.
Also, since GN ReSound invented the (Airlink 2/Noahlink Wireless) hearing aid programming device then logically Noahlink Wireless sould be your first choice of hearing aid programming device.
But, it’s not your only choice. There are alternatives; for example if you already own a Hi Pro device. Here’s a clip from DIY School PDF file named (Choose Hardware-Programming Device for ReSound); Tip; click below image to enlarge;