Polyvore Wanelo And the hunt
There's an app called The Hunt! I don't have it, but I've heard a lot of youtubers talk about it.
There's an app and website called polyvore that you can enter the item brand name and description and it will tell you where to get it and how much it is. You can also create outfits , there's a list of categories like tops, shorts, swim suits, dresses , jeans etc. and when you click on category tons of different styles and brands pop up. You can even filter what color you're looking for if you want. You can also set filter to budget is $ - $$$$.