ASR is one of the best sound and voice recording app on the Play Store
FREE and without any limitations on the recording time!

Here are some of the features of ASR:

Lots of recording formats such as WAV OGG FLAC MP4 3GP
Sample and bitrate options for better control of recording quality
Dedicated pause recording button
Dedicated discard recording button
Customizable recording folder
Voice Activated Recording (Sound monitor mode) (Pro)
Plus and minus gain mode to increase or decrease volume of recording (Pro)
Cloud integration with Dropbox Google Drive (Pro)
Auto email option to send recordings via email (Pro)
Delete and share multiple recordings
Record and play recordings while app is in the background
Pause and resume while recording
Echo cancellation mode
Auto start recording
Recording widget for quick and easy access
Very sensitive VU meter
Ability to search recordings
Rename file prompt after recording (Pro)
7 and 10 inch tablet optimization
Multiple languages