Freestyle sells other brands of "odorless" (actually "low odor" - it does have a slightly noxious odor if you smell closely, but nothing like acetic acid) stop baths with and without indicators. It's just a dye like that used in litmus paper that changes color with PH. I use Freestyle's house "Arista" brand. It's fine. Heck, 1+1 water and white vinegar works fine, but costs a lot more and doesn't have the indicator.
I like the indicator.
I'll give vinegar a try. It's just acetic acid which is the acid in vinegar.