Smartphone voice recorders are applications that allow users to capture audio using their mobile devices. These apps can be used for various purposes, such as recording lectures, interviews, or personal notes. Most smartphones come with a built-in voice recorder app, but users can also download additional options from app stores for enhanced features. These voice recording apps typically offer functionalities like playback, editing, and sharing options. Some popular features include the ability to adjust recording quality, add tags, and transcribe audio into text. Overall, smartphone voice recorders provide a convenient way to document audio on the go.