When I need to find a recipe I usually go to all recipes.com. I like the site because I can find things quickly and really rely on the comments/ratings that other people provide. For me it’s like Trip Advisor for recipes.
Once I find one and want to use it, I bring up My Recipe Book on my phone or iPad to capture the recipe. It has an easy import feature where I can suck the recipe in from All Recipes. Once in I can categorize it, generate shopping lists, make notes, etc. Is it the most full featured App vs some of the others? Maybe not but it does the primary things I need easily and reliably for a very low price!