A free program for Android, by PickNPlay.

Automatic Call Recorder ACR is the best way to record all your phone conversations. Whether you’re making calls to friends or family, or you’re having a business conversation, you can record all of them with this app.

Automatic Call Recorder ACR will let you make unlimited recordings and save them in multiple audio formats. It lets you edit and delete your recordings, and it has a built-in player so you can listen to your recordings. It’s the best way to make sure you remember all the important details of your conversations.

Automatic Call Recorder ACR is a free app that works on most Android phones.