Open scrivener Files in iOS

So I have recently been using scrivener on my Mac and I love it. It’s great to have templates for all of the various things I write in one place. However, I’m hesitant to buy the iOS app because I’ve heard about all the syncing hell with Dropbox and I’ve personally just never been a fan of it. However I’m wondering if I just open projects from my Files folder in iOS, if I’ll still be able to work on projects on different devices. Have anyone tried this? Has it worked? Would just really like to make sure I’m not going to lose work before I drop $20 on the app.