What are jailbreak apps?And is there a seperate app for managing dvc or does the eticket one do that also?
E-ticket has a DVC Calculator. I like DVC Planner better personally as I think its easier to read, but I owned that before E-ticket too, so it might make more sense for you to just buy E-ticket and not spend extra on the same functionality.
Note on E-Ticket though - I have about 25 different disney apps. While I like E-Ticket it is far from perfect. Individually, I think there are much better programs for certain aspects E-Ticket. E ticket is a jack of all trades program, good on a lot of things, but not the tops in most of them.
For example, I like the U Pin Point Map pack better than E-Ticket... I think they are easier to use and read... although they only cover the parks and DTD and the Water Parks, with each having a dedicated map. The E-ticket map is a big Meta map of the entire property... almost like a google earth view. Its cool for certain things especially resorts, but I find it way to cluttered for practical park use, although to be fair, I haven't used it yet in the parks so I will let you know once I try it. These are just my impressions. I hope that there is an option to jump to a dedicated map future releases (as opposed to jumping to another part of the Meta Map). This is of course a personal preference, as others might like it this way.
Park hours are handled decently, but aren't organized as well as they could be and doesn't have show times or Fantasmic dates on them. I prefer the program Park Hours, which is much better organized and has show times and fantasmic times, etc. Fantastic App.
The itinerary function has a lot of cool features not found on other apps. It allows you to type custom itinerary items. However, I would like to see more features of the app Mouse Memo in there, especially the ability to cycle through choices and not just type it in, although the typing it in is useful for off property hotels that aren't in Mouse Memo... Mouse Memo is like a digital storage book for Ressies, entertainment, etc, not just flight and hotel like on E-ticket. I am planning on using the two together quite a lot on my upcoming trip and see values in both.
Menus are on E-Ticket, but you have to dig through 6 screens to reach them from the mail screen and they aren't easy to find. Was actually a bit disappointed here and hope they fix this in the future. Instead I prefer WDWDine which uses the AllEars menu set and only takes 3 screens to see a menu.
Now E-Ticket has two very strong features I can't get with other programs. One, is the Disboards... posting through there is SO MUCH BETTER than on the mobile Safari browser. The other is the Browse tab, which allows you to look up descriptions and reviews of all the attractions, restaurant and shows... even though I hate that the only location of the menus is here, for getting information its TOP NOTCH.
My initial impressions, I give it a B. However, I do think it will become an A+ over time as feedback comes. Right now it feels more like a computer experience with a lot more clicks and typing, than a phone experience. But I do think it is an essential buy... its just not too the point of being the only app you'll need.
Now For Disney for a new iphone user, I'd buy these apps
E-ticket - As I said, its worth it alone for the Disboards access and the Browse feature and I think the Itinerary planner is useful as is the Metamap.
U-Pin-Point Park Maps Set - But the big set all together and you can switch between those and the Meta Map on E-ticket.
Mouse Memo - All your reservation numbers, etc at your fingertips.
Park Hours - Gives you all of the days shows, parades, etc.
WDW Dining - Links to All Ears Menus, easy to use.
WDW Wait Times - This is free... Its the most accurate of the ones I have tried but it is based on human feedback. Gives you a ball park though. And its free.
Optional -
Transportation Wizard - This gives you transportation option. Not a necessity, but can be nice for alternative transportation methods.
WDW Pal - All the discounts available. Not a great app, but that info has saved me some cash and time.
Walt Disney World Weather - Custom Weather for Disney World. TWC does the same thing but this is hard coded for Orlando.
Notecasts are just facts and tips. They are a good read.
So those are my recommendation for Disney Park Apps.
Jailbreaking your phone is hacking your phone. You can then run programs on the phone that Apple won't let you... such as Google Voice app. Some well known Jailbreak apps that apple should emulate are Categories, which lets you make folders to organize your apps in... I have 150 apps on three pages, Winterboard which lets you choose themes, Five Dock, which lets you add a fifth icon to the doc and five rows which gives you 20 icons per screen instead of 16. If you tire of it or it doesn't work, you can easily fix it with a restore. Its easy to do, a simple google search will tell you.