A free app for Android, by Simple Design Ltd..

Voice Recorder & Voice Memos is an easy-to-use audio recorder that allows you to record anything you want. It is the best audio recorder for Android. This sound recorder is a powerful tool that can record lectures, speeches, and more. The application can record in high-quality, and it has many options for you to choose from. 

It can record audio in any format, including MP3, WAV, M4A, and many more. This is a great tool for recording lectures, meetings, songs, and anything else. It has a simple user interface. 

The application is also capable of recording audio in the background. You can record while you are using other apps. You can also set the recording time limit. It has a built-in sound filter to remove any unwanted sounds.