I recently started using the Yummly app and love it!
You get a free account and add recipes that you like to your account.
Recipes that are already part of Yummly can be searched using filters so it only shows you recipes that fit your diet.
If you want to save a recipe you 'Yum' it.
Once saved, there is a built-in shopping list and you can add all the ingredients at once, or just one-by-one. In the shopping list the ingredient will note the recipe(s) you need it for and how much. You can also add your other shopping items to the list and use it as your global grocery shopping list (if you have a smart phone).
You can set the date and time you want to eat a dish and it will be entered on your calendar with a notification when to start preparing it. (Yes, I need such a thing!

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Many recipe websites online have a little Yummly/Yum button that allow you to add the recipe bloggers recipe to your saved recipes in Yummly. Yummly will link back to the web page for directions, but if the recipe is already part of Yummly, the directions are in the app.
You can rate and comment on a recipe in the app, so if you tweaked it somehow you liked, just add it to a comment for others and your comment will be there for you when you make it again.
The other day I emailed the Yummly people and asked if there is a way to add an 'add to Yummly' button to a Wiki page so we could use it. I haven't heard back.
There are probably other such apps, maybe even better ones?, but if so I don't know about them. Please share if you use a different one.
ApoE 3/4 > Thanks in advance for any responses made to my posts.