Actually one of the best recorders in the app store…

The principal thing it lacks is auto-save. You have to manually save what you record, before switching to other apps or locking the phone. Or will be lost.
I did a ton of research on dozens of recorders before choosing this one and the Dictate+Connect app, which is better for most purposes.
But I use this app frequently. (Particularly for singing melodies because it has a slower auto-record and wont cut me off at every pause).
Its solidly coded, never crashes and has the most important features. And manually saving when done has become surprisingly effortless.

How GH about Recordium - Free Voice Recorder, v3.2