They really need to add Whatsapp. Delta has it free on their flights, along with iMessage. Otherwise, they are blocking out 87% of the marketplace from using texting and Disney's own app is pretty bad at delivering messages timely. I can't figure out why 13% market share takes precedence, unless it is somehow technically much easier to offer free iMessage than Whatsapp. But if Delta can do it, Disney should be able to figure it out.