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Compare PDF pages visually and export highlighted differences

Count text and set writing goals

Build a resume while checking the free export and renewal boundary

Choose a resume format and get feedback from a trusted contact

Request a ride now or reserve ahead in a supported city

AI study platform for homework help, notes, flashcards, quizzes and exam prep.

Short programming tutorials beside exercises and references

Send ICMP probes to many hosts from one program

Count words and inspect text statistics

Count characters, spaces and paragraphs

Test matching, substitution and extraction rules

Explore word usage in text corpora

Receipt rewards with personalised purchase offers

Search checkout coupons through a browser extension

Original series, films and separately labelled viewing offers

Nutrient and water calculations for planted aquariums

Preflight and fix print PDFs inside Acrobat

Compare answers from ChatGPT, Claude, Gemini and other AI models side by side.

Arbitrary-precision arithmetic that keeps track of units

Integration with visible input, steps and graphs

Mathematical solvers alongside lessons and formulas

Statistical tests, power analysis and descriptive tools

Focused browser calculators for statistical questions

Focused statistics tools for research calculations