They all will require quite a few permissions, as they need to to work. It’s needs camera, web, and file system at the very least. The down side of android showing you what permission is wanted, is that it scares people, historically on ios you want informed, so what you didn’t know, couldn’t freak you out. But most of the time, when you think why do they need these permissions there is usually good reasons for it. But if your a technophobe, you’d never think of the reasons, so they get freaked out.
Some devs take the pee, with permissions, and you’ll see they get called out in the comments and will have a low rating. I use a simple method of picking somthing with high download figures and a good rating. You can’t go wrong really.
I couldn’t recommend one over the other. I don’t keep one on my phone. Just dead the top one when needed then take it off. Probably need on a few time a year max.
I see most contain adds now, about 6 down, in the search one called “QR code scanner” doesnt have adds. But I wouldn’t be put off but adds, as your in and out the app in seconds.