PCM Recorder for Android
No matter what settings I used, this app would continually refuse to record. Whenever I hit the record button, the timer would appear at the top of the screen for a split second followed by a message which read: "Not saved. Too short time: ###"
by O####:
Capable of great audio quality, much better than the default Samsung app is capable of, but you have to hold the button down during record. Let go, and recording stops. There's also no option to change the directory that files are saved to. Still, it is free, and there are no ads, so thank you developer for your hard work and providing this.