Find somebody who has the passion for marketing that you have for your app. You obviously have talent, but you can waste years of work and money trying to do everything yourself.

Do not continue to exchange hours for dollars. It is a losing game. You can never win doing this. Bill only by the project. And get paid according to percentage of completion. In addition, charge a royalty whenever possible. You have to establish yourself as the go-to expert in your field to do this.

Alternatively, follow my advice below.
Spend as much time as it takes to come up with answering this question..Why would I buy your product or service? This will give you your USP. From there you will develop your drive, your, passion, and your marketing voice. From this you will develop unstoppable perseverance for success.

Just hire a VA to do this and get your approval, before submitting or making changes. Contact me if you need to know how to get a good Virtual Assistant for these tasks. It would be great if we all had endless amounts of time, but in order to be really successful you will have to focus your attention on what you do best.

Sign up for all of there newsletters then respond with your brief pitch. Many are do-not-respond emails, but you will be suppressed at how many are not. Secondly, type in words related to your product and put the name of the newspaper, media that you want behind it in the search. For example, (type of product) WSJ. Then contact the writer who wrote a similar story as yours. Their email address will usually be at the bottom of the article. I have been featured in NYT, WSJ, ABC News and other media by doing this.
Best of Luck,
Mike
From the Trenches to the Towers Marketing
I will be glad to help as my time permits.