How To Cook Everything Vegetarian - $9.99
This cookbook is the ultimate option for vegetarians, even in hardcover form. The book has thousands of recipes and tips, and the app makes the experience even better. This awesome resource is now fully searchable and gets periodic updates, taking the book to a whole new level. It's a must download for both vegetarians and vegans.

Eden Foods - Free
Eden Foods doesn't have as many recipes as How To Cook Everything Vegetarian, but it does have beautiful pictures and is searchable by diet -- and the lack of a download fee doesn't hurt. Refine your search by selecting vegan, or get as specific as macrobiotic, high protein, gluten free, and more.

Food Additives 2 - $3.99
Food Additives 2 isn't specifically designed for vegetarians and vegans, but it's an amazing resource. If you're ever wondering where those random additives in your food are sourced from, look no further -- Additives 2 describes where food additives come from, be they plant or animal in origin.

Go Vegan! - $6.99
Go Vegan! is a pretty basic cookbook style app, but features entirely vegan recipes and a large number of them. Plan entire meals and shopping lists with it! And it's created by a woman once dubbed "the world's coolest vegan" by Herbivore magazine, so that seems like a ringing endorsement.

Green Kitchen - $0.99
Green Kitchen will add a number of vegetarian recipes to your arsenal. While functionally there are a lot of apps for such a function, Green Kitchen has an especially gorgeous interface that is full of high resolution photos. The photos alone will make you want to cook (or just eat).

Veg Travel Guide by Happy Cow - $2.99
Veg Travel Guide by Happy Cow is a handy location-based app that shows vegetarian and vegan restaurants around you. Use it to find vegetarian, vegan, and veggie friendly joints in your neighborhood and beyond. If you're planning a trip, be sure to keep this in your back pocket!

VeggiePassport - $0.99
This cool app translates a variety of phrases about vegetarianism and veganism into a number of languages, from Chinese to Lithuanian. It will even use the language's own script, so you can show it to restaurants, servers, and other cooks you encounter on your travels.

VeganXpress - $1.99
Fast food places don't provide a ton of options for non-meat-eaters, but if you're ever out with friends and starving, this handy app will let you know what's vegan and vegetarian on the menus of a large number of chain establishments.

VeganYumYum - Free
VeganYumYum is an excellent vegan blog with tried and true recipes, and beautiful photographs. This app brings the blog's recipes and photos to your iOS device, and you can even save your favorites for handy access later.

Yelp - Free
Did you know you can look up vegetarian and vegan restaurants specifically on Yelp? Yelp is great for any foodie. Use it not only to find the best veggie places, but follow fellow vegetarian and vegan Yelp reviewers so you can really figure out how vegetarian-friendly a restaurant is.