iCrosss vs Set Theory Foundations

iCrosss is a unique educational application which will help you learn solid geometry in an easy and funny way. "It is an extremely well-done interactive encyclopedia of polyhedra" - Kurt Schmucker (Parallels Senior Product Manager) iCrosss allows you to build a cross-section of each available polyhedra by your defined plane. The plane can be defined by three points (taps) on polyhedron faces. The application supports such kinds of polyhedra as regular polyhedra (Platonic solids), Pyramids, Prisms, Anti-prisms and Archimedean solids and duals. Polyhedrons are displayed in 3D representation, which allows you to rotate it in any direction. Cool chalkboard drawing style and fonts were used for awesome look’n’feel. To build a cross-section you have to put three points on polyhedron faces in order to define a section plane. There is several view modes that you can use for better cross-section experience: 3D mode, Épure (3 projections mode), 3D cut mode. 3D cut mode is available only when you have already built cross-section. In this mode you can choose one of two solid pieces of initial polyhedron to continue work with. Available menu for printing and sending via e-mail of the polyhedron or its section. You can access information regarding selected solid, which includes short description, number of faces, vertices, edges, web-link for more information and useful formulas. Polyhedra are organized in simple list divided by categories. Moreover, you can put polyhedrons you like into favorites list. Favorite solids are marked by a golden star and can be rapidly accessed. A tutorial mode was designed for quick understanding. It will take you through the general application features. To display formulas custom rendering engine was developed. It visualizes a LaTeX formula format.

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.