Bulk Edit by Webyze

You need this app, if you change your site a lot, if you have to deal with exchange rates changing, if you add lots of products often, if you need a quick price adjustment here and there for lots of products at once, this is a must have it looks pricey but I guarantee you will waste more money not having it than spending the 26$ to get it it also has a new update where the compare at price if set as blank will be blank and not 0, this is important and the devs fixed it very fast for us, 5 stars

Worked great for our application. Would probably keep if monthly fee was cheaper or had just a one-time fee.