Greetings sir,
I have read the project description, and we've done similar tasks on few of our projects before.
We're team of 6 European iOS / Android developers, all experienced in their fields of work, and we're interested in working on this. We can also offer for future work any additional features, project elements, and alterations of the existing elements as we highly prefer to work with employers whom we have worked with before.
If you have any questions, please don't hesitate to contact us.