Flash: Voice Calculator is a free and ad-free Natural Language Calculator designed for iPhone users by Neurogram LLC. This educational tool allows users to perform a wide range of math operations, from basic calculations to complex scientific and graphing functions, using simple voice commands.

With Flash, users can effortlessly input math questions by speaking into the microphone and receive instant answers. Editing questions is intuitive, requiring a tap on the input field and the "go" key on the virtual keyboard. Additionally, users can share results via email or messaging apps and access a history of all past operations for reference.