Discrete Math vs Qedra

Discretica helps CS students learn discrete math with interactive calculators, proof practice, and 500+ guided problems you can study offline. Built for Discrete Structures and Discrete Mathematics courses, Discretica focuses on the topics that show up in homework, quizzes, midterms, and finals. What you can study: - Logic and propositions: connectives, truth tables, equivalences, and quantifiers - Proof methods: direct proof, contradiction, contrapositive, and induction - Sets, functions, and relations: set operations, Venn diagrams, properties, and mappings - Counting and combinatorics: permutations, combinations, pigeonhole, and binomial theorem - Graph theory and trees: paths, cycles, connectivity, BFS, DFS, and spanning trees - Boolean algebra: expressions, laws, logic gates, simplification, and circuits - Number theory: divisibility, primes, modular arithmetic, GCD, LCM, and Euclidean algorithm Interactive tools: - Truth Table Builder for logical expressions with AND, OR, NOT, implication, biconditional, and XOR - Set Operations with union, intersection, difference, symmetric difference, cardinality, power sets, and Venn visuals - Combinatorics Calculator for permutations, combinations, factorials, and stars-and-bars - Modular Arithmetic for addition, subtraction, multiplication, powers, and inverses - Base Converter for binary, octal, decimal, and hexadecimal - GCD and LCM Calculator with Euclidean and extended Euclidean steps - Proof Trainer with fill-in-the-gap, reorder-the-proof, and choose-the-method exercises Practice that actually helps: - 500+ bundled practice problems across beginner, intermediate, and advanced levels - Hints, explanations, and step-by-step solutions - 30 rotating daily challenge problems - Mistake notebook with spaced review - Progress tracking with streaks, levels, topic mastery, and achievements - 54 formula and reference cards across the core syllabus Free to start: Use four free calculators, read the first subtopic in every module, complete daily challenges, and practice up to 8 problems per day. Discretica Premium unlocks all lessons, all tools, unlimited practice, step-by-step solutions, the full mistake notebook, and the proof trainer. Choose a weekly or yearly subscription, or unlock lifetime access with a one-time purchase. No account needed. No ads. Your learning progress, preferences, and mistakes are stored on your device. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Work through supported calculus, algebra and matrix problems offline, with exact answers and steps you can follow. Qedra brings university mathematics to your iPhone and iPad. Calculations run on your device, even in airplane mode. No account is needed. BUILD THE PROBLEM YOU MEAN Enter derivatives, integrals and limits with guided fields. Use a matrix grid for determinants, inverses, row reduction, rank and eigenvalues. Check the live preview before solving, or type directly with the mathematics keyboard. UNDERSTAND THE WORKING Open a step to read its named rule, explanation and assumptions. Fractions stay exact. Where a verification check is available, Qedra shows its result and limitations. Some inputs remain symbolic or receive a method-limit explanation. KEEP YOUR REVISION NOTES Save useful problems in a course notebook, add your own notes and labels, search your collection and mark topics to revisit. Saved problems keep their original notation, operation and real or complex setting. Notebooks stay on this device. PRACTISE WITH HINTS Try a problem yourself, ask for a hint and reveal the solution one step at a time. Supported practice topics include power-rule derivatives, polynomial integrals, integration by parts, 2 × 2 determinants and linear equations. Scratch work is not automatically graded. MATHEMATICS FOR YOUR COURSEWORK - Algebra, equations and inequalities - Limits, derivatives and supported integrals - Partial derivatives, multiple integrals and vector calculus - Exact determinants, inverses, row reduction, rank and eigenvalues - Discrete mathematics, probability and statistics - Complex arithmetic Decimal-comma input, notation settings, a rule reference library and translated explanations help you follow the mathematics in your own way. START WITH THE FREE TIER Get unlimited answers, three full worked solutions per day, the most recent 100 unpinned history entries, one course notebook and one practice example per topic. Pinned history stays until you delete it. Text sharing and copying answers as LaTeX are included. The free tier can show a banner on the Solve screen. QEDRA PRO Pro adds unlimited worked solutions and history, more course notebooks, additional practice variations, formatted solution PDF export and no ads. PDFs include the answer, working, assumptions and verification. Existing notebooks remain readable and editable if Pro ends. Choose a monthly or annual subscription, or a one-time Lifetime purchase. Localized prices, billing periods and any eligible offer are shown before you purchase. Lifetime does not renew. Your problems and notebook notes are not uploaded to a Qedra server or sent to the advertising partner. Purchases and advertising services can use an internet connection; see the privacy policy for their data practices. Subscriptions renew automatically unless cancelled at least 24 hours before the current period ends. Payment is charged to your Apple Account at confirmation, or after an eligible trial as shown before purchase. Manage or cancel in Settings > your Apple Account > Subscriptions. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mwsupplylimited.github.io/qedra/privacy.html