Caktus

Caktus is a web-based AI study platform built for students who need help writing, solving problems, and preparing for exams across a set of specialized academic tools.

Key capabilities include:

• AI essay writing with real citations, with support for common citation styles like APA, MLA, Chicago, and Harvard, plus options to control essay type and length
• Step-by-step math solving for topics such as algebra, calculus, and statistics, showing the work so students can learn the process
• Text humanizer and improver that rewrites AI-generated text into more natural-sounding prose using multiple style presets
• Flashcard and quiz creation from lecture notes and documents (including uploads) to produce study-ready decks

Pricing: Freemium, with paid subscriptions for broader access and longer outputs (site lists multiple plans; check current pricing in-app).

Notable for offering 25+ purpose-built academic tools in one place, including citation workflows and document uploads, and for positioning features around responsible use (citation reminders and integrity guidance) rather than a general-purpose chatbot experience. Trusted by 3M+ students per the website.