iPad Apps to Calculators

Calcbot is a sophisticated calculator and unit converter application designed for iOS, macOS, and watchOS. It combines powerful mathematical functions with a user-friendly interface, featuring an editable history tape, natural language input, and comprehensive unit and currency conversion capabilities.

Cortana is a digital assistant developed by Microsoft, integrated into Windows 10 and other Microsoft products. It provides users with voice-activated assistance, information retrieval, task automation, and personalized reminders, aiming to streamline daily computing tasks through natural language interaction.

Siri is a powerful virtual assistant developed by Apple, deeply integrated across its ecosystem. It allows users to interact with their devices using voice commands to perform a wide range of tasks, from sending messages and setting reminders to searching the web and controlling smart home devices.

Google Now was a proactive smart assistant designed to provide users with timely information based on their routines and searches. It anticipated needs and presented relevant 'cards' without direct user queries, leveraging Google's vast data ecosystem.

Google Sheets is a free, web-based spreadsheet application that allows users to create, edit, and collaborate on spreadsheets online. It's a powerful tool for data analysis, organization, and visualization, integrated within the Google Drive suite for seamless cloud storage and synchronization.

Wolfram Alpha is a computational knowledge engine that directly computes answers and provides curated data across a vast range of subjects, rather than merely linking to documents. It serves as a powerful tool for calculation, data analysis, and knowledge exploration using natural language input.