Simple Voice Calculator is a free utility tool available on the iPhone platform, developed by Ravi Heyne. This innovative calculator stands out for its voice input and output feature, allowing users to perform calculations hands-free. The app supports math operators like addition, subtraction, multiplication, division, brackets, commas, decimal points, and percents. One notable feature is the ability to preview the equation components and results in real-time.

Simple Voice Calculator is unique in that it is completely free, created by students, and ad-free. It supports multiple languages including English, German, Italian, Spanish, Hindi, and Korean. The app's intuitive interface enables easy and instant editing of equations, making it efficient for both simple and complex calculations.