Wallet App mobile

I am looking for someone who has already developed a mobile app or something similar that has to do with the sale and purchase of cryptocurrencies, I leave screenshots of a mockup. If you already have something similar write me. NOTE: I only require the apk to present the project, but if everything works correctly it will connect with an API from a third party provider. It could also only work as a proposal I require a quick project.

IF YOU DO NOT HAVE ANYTHING PLEASE DO NOT WRITE I AM LOOKING FOR SOMETHING ALREADY DEVELOPED