A text-based calculator app.Hissab is a text-based calculator app that allows users to perform quick calculations, complex workflows, basic math and percentage operations, helpful date, time and timezone calculations, unit conversions, and alternate number systems and binary operations. The pro version offers additional features such as currency exchange rates, autocomplete suggestions, books and pages for organization, and breakdown of large unit values into multiple units. Hissab is available on web, mobile, desktop, and browser platforms.