A free program for Android, by Aspiration Solutions.
This application allows you to make recordings of your phone conversations. It is very easy to use and works perfectly. It does not require any extra hardware or software. All you need is a device with a microphone.
Once you open this app, you will see a recording option in the main menu. Just tap on this option and you will be able to record your conversation. There are two options for recording: one is when you are talking to another person and the other is when you are talking to the phone.
You can record your conversations in a.WAV file. The quality of the sound is very good. This app can record conversations in English.