Hello,
We have relevant work experience in SmartPhone apps development, though we have never charged this low but just to introduce ourselves on this platform and to let people know about our expertise here on freelancer we are willing to work on your project for 500 USD and we shall accomplish it in 12 days, however this can change depending upon your further requirements but the rates shall remain same and we shall work until we satisfy you with our services.
Best Regards,
Team KNYSYS