My favorite app is Ziplist (free). Ziplist.com allows you to save recipes you find online (I have hundreds), and also has a separate grocery list function. You can add recipes to your shopping list, as well as create checklists of regular items that you need. Then I can access all of it from my iphone - the grocery list while I'm shopping and the recipes when I'm cooking. Totally free. Love it!

I've found the Allrecipes.com Pro app to be worth paying for. My wife and I share a login, and it's nice to be able to pick a recipe on the website while I'm at work and cook from it on my phone that night, not to mention both of us being able to surf their site at the same time and share what we're finding quickly and easily. The recipes usually need a little tweaking, but the comments give great guidance for that.

I've used a lot of the quick and easy recipes from Martha Stewart's Every Day Food app. I'm also a fan of All Recipes but for some reason I enjoy the free version better than the Pro version. I've been disappointed in nearly every professional chef's application that I've purchased. And last, but not least, the Whole Food app has a lot of recipes that work for my diet choices.

I use Shopper for food shopping mostly because you can sync with other users (like my wife) so you know what has run out. Also KitchenHelper, which is great for ingredient substitutions and Locavore for what's in season and the locations of farmer's markets in your area.

I really like the "How To Cook Everything" app from Mark Bittman (I have the Vegetarian version, but they have the original everything version for both the iPhone and iPad). I actually had the book version, but I threw down the few dollars for this app and have been satisfied so far. It's pretty handy for searching purposes. You can search the database and filter by ingredient, style or cooking technique. It comes in handy when I'm at the store or market and I see something on sale. I can do a quick search on the app to see if it's worth getting or not.

I use the iPhone app "Meal Board" for meal planning and grocery list. You can enter in your own recipe ingredient lists (online using your computer or on the phone using the app) and plan meals using the recipes you enter. The planner will show up to 2 weeks at a time. You then can synch the meal plan with the grocery list and will pull all the ingredients you identified as necessary for a recipe and populate it into the grocery list. And you can add your own items to the grocery list that may not appear as an ingredient in a recipe. All in all it's a pretty nice app.

I really like the Harvest app (1.99) It lists every imaginable fruit and vegetable, when it's in season, and how to choose a ripe specimen. It also lists them in order of pesticide residue, which helps as I can't afford to buy 100% organic.

I agree with the first poster about Ziplist. I have it on my laptop, iPhone and iPad. They have a recipe clipper app that will automatically copy recipes on the web into your account. When you want to shop for a recipe, you can add the recipe to your shopping list -- it prompts you with the ingredients, separated by those items you most likely have in your pantry and those you don't. You can select which items to add to your shopping list. You can have multiple lists that can be shared. Many, many more features.

I recently purchased the KitchenPad Timer ($1.99). It allows you to set multiple burner and oven timers, you can customize and even set favorites.

I am surprised no one has yet mentioned "Paprika" as it is a great recipe book app. I had been searching for an app that lets me create my own recipe book (not utilize other peoples like Epicurious) and this app fit the bill and works beautifully. It is easy to input my own recipes or add ones that I find online reading wonderful websites such as this one. For any serious cook looking for a cook book app, Paprika is the way to go. http://www.paprikaapp.com/

Does any one else have any similar cookbook apps or is everyone just using EverNote?

I also love the All Recipes.com app. I've used it countless times and I love carrying my "recipe box" around the store with me.

have to agree with CMEvans. I've been using Paprika as my defacto app for quite a while. It allows you to save any recipe from the web into your own personal database, and add your own in. I personally find it useful enough that i paid for the ipad and iphone version (would be nice if they were combined) and i pay for the cloud sync so any changes on either device sync up. Makes it simple to save recipes, plan a meal, create a grocery list and then sync it to the iphone for shopping.

Highly recommended

These are all pretty good. I was a big fan of the epicurious app, but then I found a free app by about.com real recipes (http://itunes.apple.com/us/app/real-recipes/id486460275?mt=8). I think it's just got wayyyy more content, and just the layout of the app makes more sense to me. Sometimes when I'm trying to find a recipe in epicurious that I've already seen, the search says there are 0 results :-/

I actually made an app called 'Fridge Pal' that I think may be worth checking out. It's free to download.

It's essentially a home inventory / shopping list / meal planning app. It lets you scan items in by their barcode to record what you have at home + get reminders of expiry dates. From there you can look up recipes and plan a week's worth of cooking. In addition it will let you build up shopping lists as well as share them around with other people. I'm continually improving the functionality and basically trying to make the best home kitchen helper for your iPhone / iPad.

If people want to grab it and let me know what they think I'd appreciate it.
https://itunes.apple.com/us/app/fridge-pal-shopping-lists/id496451091?mt=8