99cards.dev
Crush Every Web Dev Interview. Get A Dream Job. Guaranteed.
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A flashcard-based app that uses spaced repetition and active recall to help web developers master interview concepts quickly.
- for
- Web developers preparing for technical interviews, from entry-level to mid-level.
- pricing
- contact sales
Key features
- Spaced Repetition Engine — Presents flashcards at optimal intervals to lock knowledge before you forget.
- Active Recall Quizzes — Interactive multiple-choice quizzes test you on core web-dev concepts.
- Instant Feedback — Each answer shows detailed explanations and why it was right or wrong.
- Progress Tracking — Shows scores, completed categories and visual indicators of mastery.
- Technology Coverage — Covers 24 categories across front-end, back-end, databases, git and performance.
- Bite-Sized Sessions — 20-25 minute daily quizzes fit into busy schedules.
Use cases
- Prepare for a React interview by mastering portals and hooks in under an hour a day
- Identify and close knowledge gaps in Node.js and Express before a backend interview
- Quickly refresh JavaScript closure concepts right before a live coding interview
99cards.dev FAQ
What if I don’t pass an interview after using 99cards?+
The site offers a money-back guarantee: if you don’t get a job, you can request a refund.
How does the app decide which flashcards to show?+
An intelligent algorithm tracks your performance and schedules cards using spaced-repetition timing.
Do I need to watch videos or read tutorials?+
No, the system replaces tutorials with focused quizzes and explanations.
Can I study multiple tech stacks?+
Yes, the app includes questions for HTML, CSS, JavaScript, TypeScript, React, Angular, Vue, Node.js, Python, databases and more.
Is there a limit to how many questions I can practice?+
The current library contains over 4,900 questions across all categories.
Summarized by DevHunt from 99cards.dev · Oct 3, 2026. Details may change; check the official site.
