Auto call recorder is a free mobile app for Android devices that allows you to record any incoming and outgoing calls from your phone automatically. You can save those recordings directly to your phone.

The best part about this app is that it has a feature that allows you to:
-Record everything. This is the default setting where all calls are recorded except for pre-selected contacts you want to ignore.
-Ignore everything. You only pre-select calls to be recorded.
-Ignore contacts. All calls that are not listed in your contacts are recorded, except for pre-selected contacts.

You can enable and disable them anytime you want and you can set recorded calls to your favorites as well.