You might be interested in Paprika, it can import recipes from anywhere, let you edit/save them, and scale. It's got a ton more features than just that but it's a great app and worth every penny.
Agreed, happy user of Paprika here. It also has multi-device syncing, so my wife and I have a common place for them. We both cook quite a lot. Found Paprkia via HN comments 2-4 years ago. It is paid, and there's a Mac laptop app that is an extra charge. Around they holidays they usually have a sale, but I think it was ~$10 for both my wife and I to get.
