Set Theory Foundations vs Periodic Table Buddy

Set Theory Foundations is an independent study app for learners who want focused practice in core set theory ideas, proof habits, and common reasoning patterns. It is built for beginners, students reviewing discrete math, interview prep learners, and anyone strengthening mathematical logic skills. Practice across four focused categories: - Fundamentals - Practical Skills - Common Pitfalls - Advanced Concepts Features include: - 160 practice questions - Every question includes an explanation - FSRS spaced-repetition intervals to review at the right time - Weak-point heatmap to show what needs work - Daily challenge for steady progress - Mock exams for timed review - Offline practice with no login required Use short sessions to drill definitions, operations, relations, functions, cardinality, proof techniques, and tricky edge cases. Review missed questions, track weak areas, and build confidence before class, exams, or self-study milestones. Practice offline, no login required. Independent study app for Set Theory Foundations practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.

Periodic Table Buddy is a chemistry learning app built around the periodic table, element facts, memory practice, quizzes, and visual explanations. Explore all 118 elements in an interactive table, then open rich element details with properties, common uses, chemistry facts, isotope notes, electron shell visuals, and reference links. Search by element name, symbol, or atomic number, and filter by category when you want to focus on a specific family of elements. The app is designed for students, teachers, tutors, and curious learners who want chemistry to feel easier to remember. Key features: Interactive periodic table with all 118 elements Element detail pages with properties, facts, uses, images, and reference links Flashcards for element recall practice Quizzes for testing chemistry knowledge Mnemonics and comic strips for remembering groups and periods Element comparison tools Browse mode for quick lookup Virtual lab simulations for simple reaction learning Local progress tracking without accounts, ads, analytics, subscriptions, or in-app purchases Periodic Table Buddy is educational software. Lab simulations and reaction notes are intended for learning and should not be used as real laboratory safety instructions. What's New: Initial release.