I took a quick look at reminderhero, and don't think your issue is visual appeal. It isn't blatantly obvious from your landing page how the app works. Do you talk to it? Text and/or email it? I know there is mention in one place that you can send an email, but that doesn't ring out loud and clear, that it applies to all uses. I would recommend adding a simple diagram of input to output in layman's terms, or a short video, or at least say "talk" or "text" on "email" in, get whatever out.