Feedback Recorder is an iPhone app developed by AKIRA IWAi, falling under the Utilities & Tools category. This audio recorder allows users to check input audio in real-time, with the added feature of displaying effects when connected to earphones or headphones. It enables recording while monitoring one's voice, making it ideal for vocal recording, voice training, and lessons. The app offers real-time input playback and recording, the ability to use iTunes music for karaoke, and supports multiple recording files for user convenience.

Feedback Recorder comes with a warning that it cannot play music stored on iCloud and advises against connecting to speakers to avoid potential howling issues.