The best content is about real content and if you are the owner of the product it should be you to at least draft the content. After that you may want to have someone to text proof your text.
This is how I worked till now, but it doesn't seem feasible to keep doing as I feel my time and attention will be more useful building additional features/fixing bugs, aka programming /which is the thing I prefer to do anyways/.
on this - the best thing you can do with your time is talking to your customers and writing down what they say about your product. Then, use those exact words in your content; in essence have your customers write your content for you. If you are really pressed for time, just pay a copywriter to write your content but definitely give them a copy of your customer's words.
This could work on a certain level/like front page, AdWords, FB Ads/, though I don't really know how can I trick my customer to write a blog post for me or an article that will be published in a magazine/blog.