Greetings,
I have read Project Description & we are experienced in swift, so no problem, we can make sure that it works fine on iPhone 6 & plus, as we are already working on few Apps, so we have clear idea. About Samsung galaxyS3, we will check, because I am assuming you want both iOS & Android App. However, please provide me detailed requirements, some high level features/tasks, after that I can confirm you our precise estimate.
Our current bid is just a placeholder, as we cannot submit the proposal without entering any amount but once you respond us, we can then finalize it.
Look forward to hearing from you.
Regards,
YK
LEADconcept