Hi, I'm Product Manager at vocabla.com. I work on design, UI, UX on a daily basis. Up to date, for over 1,5 year I've prepared more than 200 enhancements for Vocabla both for web & mobile with strong focus on conversion rates. I've read app requirements and it's a really nice idea. I can prepare wireframes in Balsamiq and then design interface based on that in Photoshop. Best Regards, Kuba