Hello,
my name is Liliana, i have over 10 years of experience as a designer, doing mostly icons and app design.
Please, check my Freelancer portfolio to see some of the , in order to evaluate my work. I can send you more samples, if you want to.
I use Illustrator for this kind of projects, i can deliver you the files as vector format or layered PSD, and also saved as any other format and resolution you may need for devices.
The description of your project sounds really interesting, and i would like to create an original and functional app, not only visually appealing,
also clear and easy to use, with originals icons and graphics.
I hope that we can work together, please, contact me if you have any questions, or if you want to see some more of my work.
Best regards.
Lili.