There are already apps that does it. Please let me know how do you think the existing app works and if you can build one?
24 freelancers are bidding on average $227 for this job
Hi Relevant Skills and Experience I read your description and i can do this job. i have much experience in this skill. Proposed Milestones $150 SGD - D
I am professional mobile developer. It is possible by using magnetic sensor. I can do it! Hope to work with you Stay tuned, I'm still working on this proposal.