Best AI tools to explain complex topics
| Tool | What it does | Pricing | Free tier | Refunds |
|---|---|---|---|---|
| Quiz Solver AI | AI-powered browser extension and Android app that helps students automatically solve quizzes and homework. | Free tier; paid from $5.42/mo | Yes | — |
| Claude | An AI assistant for collaboration on coding, data analysis, writing, and complex problem-solving tasks. | Free tier; paid from $16.67/mo | Yes | — |
| Kin | A persistent, evolving personal AI that remembers your history to provide support, advisory, and guided reflection. | Not stated on site * | — | — |
| Astra AI | A personal AI tutor for all subjects, guiding students step by step through exam prep and homework. | Free tier * | Yes | — |
| Vertech Academy | Library of engineered AI prompts turning ChatGPT, Claude, and Gemini into personal academic tutors. | Free tier; paid from $29/mo | Yes | 60 days |
— means the vendor does not state it on the pages we read.
* pricing not verified against the vendor's pricing page.
Quiz Solver AI
Visit Quiz Solver AIquizsolverai.com
AI-powered browser extension and Android app that helps students automatically solve quizzes and homework.
Use the "Explain" request type for detailed breakdowns, or "Rewrite" to improve your writing.
Pricing, in their words: “Quiz Answers: 120 answers per month.” (pricing)
Subscription terms they state: cancel in-app · auto-renews (source)
Limits the vendor states:
- no refunds for inaccurate answers
- no commercial use
An AI assistant for collaboration on coding, data analysis, writing, and complex problem-solving tasks.
Pricing, in their words: “$17 Per month with annual subscription discount ($200 billed up front). $20 if billed monthly.” (pricing)
No usage limits stated on the pages we read.
A persistent, evolving personal AI that remembers your history to provide support, advisory, and guided reflection.
Prep for your day, unpack a decision, find what's stuck — guided by someone who remembers what matters to you.
— mykin.ai
No usage limits stated on the pages we read.
Astra AI
Visit Astra AIastra-ai.co
A personal AI tutor for all subjects, guiding students step by step through exam prep and homework.
Understand forces, energy, and motion through interactive problem-solving.
Pricing: Free tier (pricing)
No usage limits stated on the pages we read.
Vertech Academy
Visit Vertech Academyvertechacademy.caCancellation & refund terms for Vertech Academy
Library of engineered AI prompts turning ChatGPT, Claude, and Gemini into personal academic tutors.
Source: vertechacademy.ca
Pricing, in their words: “Compare our Free, Plus, and Unlimited plans to find your perfect fit.” (pricing)
Subscription terms they state: cancel by email · auto-renews · 60-day refund window (source)
No usage limits stated on the pages we read.
FAQ
Is there a free tool to explain complex topics?
Yes — Quiz Solver AI, Claude, Astra AI, Vertech Academy offer a free tier.
What is the cheapest paid option to explain complex topics?
Quiz Solver AI starts at $5.42/month.
Which of these have an API?
Claude document a developer API.
How do I cancel these subscriptions?
Quiz Solver AI: cancel in-app; Vertech Academy: cancel by email. Claude, Kin, Astra AI do not state a cancellation route on the pages we read.
Can I get a refund?
Vertech Academy states a 60-day refund window. The others (Quiz Solver AI, Claude, Kin, Astra AI) do not state a refund policy on the pages we read.
Do these subscriptions auto-renew?
Quiz Solver AI, Vertech Academy state that paid plans renew automatically. Check the billing page before subscribing; the rest do not state it either way.
Sources
Every fact above was read from the vendors' own pages: