This tool lets you choose which calls to keep and which to delete. Once a conversation is saved, you can add notes to clarify any information you don't want to forget when you listen to it again. You can also sync these conversations to the cloud to keep them safe in case something happens to your phone.
You can choose the destination folder for all of the recordings, too, and how they are recorded. There are three possible settings, but by default, the app will record all phone conversations, whether you're sending or receiving them. There is also an 'ignore all' feature so that no calls will be recorded, and another to ignore certain people, so the app will record only conversations with people on your list.
Finally, Automatic Call Recorder can link your phone with cloud services like Dropbox and Google Drive so you can keep an additional backup of all your calls.