Hi,
This is an interesting and unusual idea - there are a number of complications when coordinating multiple devices.
* The network environment is outside the control of the app - we must cope with whatever quality of service is available.
* There is no guarantee that the connection will not be lost during transfer - the app must be able to cope with this, without generating errors.
* There is no guarantee that transfers can be completed within 10 seconds - the app must handle this correctly.
I have experience of developing such apps:
* In "EmpireSteak," food orders are communicated between two iPads.
* In "HeyHello", a master iPad controls up to 40 client iPads. Freelancer featured the project, "Antwerp Port Tours", in a case study here: https://www.freelancer.com/community/articles/laurens-van-lieshout-employer-success-story
I develop apps for iPhone/iPod Touch/iPad and Mac, using Xcode and Swift.
You can see some examples of my work, and client reviews of my completed projects, on my Freelancer profile page.
It looks like you may be new to Freelancer? Before starting the project, there should be a clear understanding of the details, the deadline, and the milestone payments.
If you are looking for an experienced developer who can offer help and advice on all aspects of app design and creation, then we should talk!
If you'd like to reply to this message, we can discuss things further, before you make your decision on awarding the project.
Best Regards,
- Rob Dixon.