'EOS' is a great looking One Page WordPress theme perfectly suited for promoting your new app. The One Page theme features a solid responsive adaption and includes 4 different Hero/Header layouts. Other features include video backgrounds, CSS3 load transitions, a good looking testimonial slider, a pricing table and includes PSD Phone mockups to ensure your screenshots look tight! Nice little feature with the email icon sliding down a contact form. The scrolling is perhaps a bit sensitive but a minor flaw in a good template offering by Canadian theme shop, Thematicwebs. There is also a $13 HTML version available too if you don't need the WordPress functionality.
EOS Wordpress – An app landing page which comes with many accent color schemes and light , dark version . EOS has 4 layout styles , features representations with simple line and font awesome icons , parallax sections , pricing tables , testimonials , images Slider , newsletter and ajax based contact form . It can be completely handled through theme options. EOS also features a pre-launch page which you can set while your app is under construction so you can show your customers what you are upto. You will be wowed by the simplicity of its usage. Credits and sources are included in documentation.