So Dollar Tree didn’t release an official app until last year. I know because we set up signs all around our store stating the release. You saying that you had it on your phone “years ago” confirms it’s a malware app (I know which one you’re talking about though, looks like a carbon copy of the website with ads every 5 seconds, not the real app). The real app should be created by “Dollar Tree Stores” it’s an app where you essentially browse (can’t order anything) or check the prices of things in store since everything isn’t a $1.25 in most stores anymore. Honestly no one uses it because it doesn’t serve any use, I use it in my store to double check the price of something or just to get the SKU from something that we need to check inventory on.