What I mean by restrictive, is now I require Alby if I want to use my Nostr profile. So in the future if Alby restricts my use, or becomes a different company with different values (I don't expect this, but anything is possible) then my profile is stuck with Alby. Also, I'm sure I'm doing something wrong but I can't install Alby onto my phone so I can only use the desktop portion. I tried an extension with my brave browser and looked into the app store and there is no app.