A full version app for Android, by velsof.

With the Voice Recorder App by Velsof, you can easily record voice memos, meetings, lectures, songs, music, and much more for your Android mobile device. You can also easily save, edit, and share your recordings. The app is compatible with most Android devices. 

You can record using either your device’s built-in microphone or an external microphone. If you are using the built-in microphone, the app will automatically record in the background. If you are using an external microphone, you can record the sound into the mic input in the Audio Mixer section. You can change the recording quality and sample rate in the Audio Mixer section.