We are working on the design for an appointments system which has to work at remote locations, comms via 4G.
Unfortunately a connection to the server may not be available at all remote locations, so data must be pre-downloaded before departure to the off site location, just in case.
The UI should be presented on mobile devices and ideally, be device agnostic so the customer isn't tied to a single device. html - in the device browser, in an 'app' wrapper, or cross platform development tool (cordova, phone gap, xamarin etc)
We originally designed a system with a server (windows or linux laptop) which would be taken out containing a local database and running a web server providing a web app solution.
We are now looking for a design which would not require the laptop to be taken to the locations - just mobile devices.
Data would therefore need to be stored on each device?, the complication being that if a person was booked into an appointment on one device the other devices should be sync'd so any member of staff can deal with the person.
Mobile devices. Device agnostic if possible Online or offline (seemless). Data sync'd between devices even in offline mode (ie no connection to Internet, but local WiFi available)