Hissab

Hissab is an AI-powered natural language calculator for students, professionals, and everyday users who need fast, accurate answers for everything from basic arithmetic to advanced computations.

Key capabilities include:

• Natural-language math with classic calculator operations (addition, subtraction, multiplication, division, powers, roots) plus percentages and discounts
• Conversions and time math, including unit conversions (length, area, volume, temperature, weight, angle, data, duration, currency) and date/time operations (timezones, Unix/epoch timestamps)
• Advanced and scientific functions, such as statistics (mean, median, standard deviation, variance, range), logarithms, trigonometric and hyperbolic functions, factorial, modulo, permutations/combinations, LCM/GCD, and number system plus bitwise operations
• Calculator-notes workflows, including pages to organize work, variables, and referencing previous results

Pricing: Freemium. Free includes classic calculations. AI Lite $10/month and AI Plus $20/month add daily prompt limits and model options; AI Plus also includes multimodal support (images and PDFs) and file attachments.

Notable for positioning itself as a calculator that computes rather than guesses, with cross-platform availability (Web, Browser Extension, Desktop, Mobile) and an API listed as available/coming soon depending on integration needs.