Hello Sir,
This is Sonia from MobiDevelopment Team.
We have alraedy developed such concept for our existing client. So, we will be able to provide you 100% output and suggest you many points in this regards (if require). Please refer the work we have executed and based on that you can decide whether you can go with us or not without wasting your time. So, please check your PMB and let me know if we are suitable for this job.
Sincerely,
Sonia