I moved last year and ended up using some street corner guys. Cost me the same as pros, more or less, but just easier for me personally. They're largely undocumented workers and a strictly cash business, though, so app-izing them would be difficult if not impossible.

However- I did also learn that it's easy to hire professional movers to just help you load a u-haul for a couple if that's what you want. Working with those companies and app-izing that labor is something that should be possible.