It's simple, but configurable tool. With built-in player and easy navigation.

You can record in high-quality with format that is the best for your needs.

MP4 uses advanced compression to achieve small size with keeping high quality.
WAV contains raw audio data, so it has the best quality but needs a lot of space.
FLAC files have quality of WAV file, but with just ~50% size.

Features:
★ Supported frequencies (Hz): 8000, 11025, 16000, 22050, 44100, 48000, 88200, 96000.
★ Simple to use, configuration is optional.
★ Formats: FLAC (default), WAV, AAC / MP4 / M4A.
★ Source selection: default, mic, unprocessed, etc.
★ Automatic date-based recording name (can be always changed).
★ Ability to pause recording.
★ Can be controlled from the notifications / lock screen (if device supports it).
★ Save on internal or external storage.
★ Built-in player.
★ Mono / stereo support.

How to:
*) Press big button with microphone to start recording.
*) Click 'stop' button when you want to finish recording. You can also make breaks in recording by clicking pause button.
*) Recording settings can be changed while playing, however some options will make recorder to finish current file and record audio to new file (because many formats can't change configuration mid-stream).
*) Recording can be played directly from the same screen or from the 'list' screen.
*) You can also share / open your recording in other apps by using 'more' button on the 'list' screen.

Ads:
May be easily ignored if you don't want to support this app.
They can be removed with in-app-purchase.