Derivative Master by ChatStick vs Qedra

Derivative Master is the all-in-one calculus companion for high school and college students learning differentiation. From your first power rule to chain rule mastery, every derivative is solved step by step — with the exact rule highlighted at each move. Whether you're prepping for AP Calculus, Calc 1, or a final exam, Derivative Master replaces hours of confusion with clear, color-coded explanations, hands-on practice, and gamified progress tracking. WHY STUDENTS LOVE DERIVATIVE MASTER • Step-by-step symbolic solver — type any function and see every derivation step with the rule applied • 11 differentiation rules library — Power, Chain, Product, Quotient, Sum, Constant, Trig, Exponential, Logarithm, and more, each with worked examples and common mistakes • Daily Challenge — a new problem every day to build a streak • Practice mode — Easy, Medium, and Hard problems with hints, instant feedback, and rule identification • Concept articles — short, focused lessons on limits, tangent lines, optimization, notation, and the meaning of a derivative • Achievements & streaks — 12 badges to earn as you level up • Smart calculator — full math keypad with sin, cos, tan, ln, e^x, π, and powers • Save and revisit — keep history of solved problems for quick review PREMIUM FEATURES Unlock the full experience: • Interactive Graph Plotter — see f(x) and f'(x) side by side on the same axes • Full Quiz Mode — timed multiple-choice exams with explanations • Unlimited Favorites — star derivatives for instant recall • Unlimited History — never lose a worked problem • Ad-free experience DESIGNED FOR LEARNING Derivative Master isn't just a calculator — it's a tutor. Each step explains WHICH rule was applied and WHY, so you build real understanding instead of memorizing answers. The color-coded interface, clean math typography, and gentle gamification make studying calculus genuinely enjoyable. PERFECT FOR • AP Calculus AB & BC students • College Calculus 1 students • Engineering, physics, and economics majors brushing up on derivatives • High school students starting differential calculus • Anyone who wants to truly understand derivatives, not just compute them WHAT'S INSIDE — Step-by-step derivative solver with symbolic engine — 11-rule reference library with formulas and examples — Daily Challenge problem (changes every day) — Tiered practice problems (Easy / Medium / Hard) — 6 concept articles on calculus fundamentals — Interactive function & derivative graph plotter — Full quiz mode with scoring and explanations — 12 achievements & streak tracking — Custom calculator with trig, log, exponential, and constants — History and favorites for quick review Download Derivative Master today and turn calculus from confusing into conquered.

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