Greetings sir,
I have read your project and we're interested in participating.
From what I see on the description, it's been summed up to the essentials, creating an Android device to work with the API you provide. Do bare in mind that we need to go through your requirements in details, as they might influence the time frame or the fee.
Regardless 2 weeks is more then enough to honor your request.
Free demos are our good practice, so we could offer a one. It would help you, in your review to help reassure you in quality of the product we offer.
As for our expertise, we are team of 17 European PHP experts /Web / iOS / Android developers, all experienced in their field of work. Quality is our main goal, for the purpose of being team of choice for our employers should they need any IT work done again.
If you have any questions please do not hesitate to contact us.