Landscaping, maybe. Cleaners and car washing are pretty commodity though. I agree with the broader point that there are a lot of tasks you don't want done by a random person who signed up with an app but those aren't the best examples.
EDIT: Just saw your response to the other comment where you thought it was dry-cleaning. It may well have been, but I'll leave my story here anyway, since it's sort of in context.
You'd just let a random person who signed up with an app into your house to clean?