Hi,
I am Praveen from ProAPPtive Solutions.
We offer to give you a double benefit in the same price that you are planning to offer us. We shall provide you with not only an Android App as well as an iOS app for the app that you are planning to get built. So you shall have the app on both the stores.
And I can send you our apps apks, where we very well exploit the GPS functionality of mobile phone, so that it showcases our capability to you.
Apart from that Social Sharing, and Login module etc, we are ready to include it for you if you need it at no additional price.
Please get in touch with us, if you want to discuss this further. Thanks for your time !