As you know, more extensive projects require keeping consistent styles and vision. That shouldn't surprise you we created styleguide for Vooom app too. It contains rules about a colour scheme, typography styles, margins etc. All you can see with details in attachment.
We also would like to encourage you to see our latest Behance case study: https://www.behance.net/gallery/98320409/Vooom-MVP-AppCheers!
Our team are available for new projects: firstname.lastname@example.org