Pin It vs Linear Algebra

Stop unlocking your phone for tiny details! Pin order numbers, codes, and quick notes directly to your Dynamic Island. View them from your Lock Screen and in any app. With Siri Shortcuts integration, logging info is faster than ever. A smarter, more efficient iPhone experience starts here. ------------------------------ Tired of digging through messages for that one code or note? Pin It transforms your iPhone's Dynamic Island into a persistent, convenient information hub. Keep what matters most always in sight. ------------------------------ Designed for the Dynamic Island • Pin Anything, Instantly: Secure your crucial text or images—like order pick-up numbers, package codes, meeting times, or to-dos—right onto your Dynamic Island. • Stays on Top: Your pinned post remains visible on your Lock Screen and above all other apps, ensuring your key info is always just a glance away. • Switch & Manage with a Tap: Long-press on the Dynamic Island to swiftly cycle through your pinned posts or unpin them—all without ever opening the app. ------------------------------ Deep Integration with Siri Shortcuts • One-Tap Pinning: Create custom shortcuts for your routines (e.g., "Pin Takeout Code," "Save Idea"). Pin any text or image with a single tap or by asking Siri. It's that seamless. • Powerful Automation: Unleash next-level efficiency. Set up automations to, for example, automatically pin your shopping list when you arrive at the grocery store or pin a daily reminder at a specific time. ------------------------------ Simplicity at Its Best • The interface is clean and intuitive, requiring zero learning curve. • We focus purely on the core experience of pinning and viewing, with no unnecessary features. It's your go-to information pit stop. ------------------------------ Who Is It For? • Food & Shopping Enthusiasts: Never miss a pick-up number or parcel code again. Find your locker in a glance. • Students & Professionals: Instantly capture fleeting tasks and sparks of inspiration before you forget them. ------------------------------ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Linear Algebra turns any matrix problem into a teacher-style, step-by-step solution: what each step does, why it works, plus the final answer, a back-substitution check and exam tips. Free to download – every tool works and final answers are always free. Note: the app interface and step-by-step explanations are in Simplified Chinese. Matrices, formulas and answers are standard math notation. 39 SOLVER TOOLS • Exam essentials one tap away: determinant, inverse matrix, systems of linear equations, rank, eigenvalues & eigenvectors, diagonalization, quadratic form to canonical form, reduced row echelon form (RREF). • Organized by chapter: determinants & matrix operations, elementary row operations & rank, linear systems, vector sets, eigenvalues & quadratic forms, polynomials. • Advanced matrix theory: Jordan normal form, singular value decomposition (SVD), LU decomposition, Smith normal form, full-rank factorization, Moore–Penrose pseudoinverse, least squares, matrix norms and more. STEP-BY-STEP, LIKE A TEACHER • Every elementary row operation comes with an explanation, not just a wall of matrices. • Linear systems get the complete general solution (particular solution + basis of the null space); eigenvalue problems list all eigenvectors; diagonalization gives P and Λ. • The answer card sits on top, with automatic back-substitution checks and notes on common exam points and pitfalls. STUDY CARDS 39 topics organized as key formulas → solving method → worked example → typical exam questions → common mistakes, each tagged by how often it appears on exams. Jump from any card straight into the solver to try a problem. FREE AND FULL VERSION • Free: all tools, final answers always free, 3 full step-by-step solutions per day. • Full version (one-time purchase, not a subscription): unlimited access to every step and explanation, available on all your devices signed in with the same Apple ID, with Restore Purchases. RUNS ON YOUR DEVICE Problems are solved locally on your iPhone. Nothing is uploaded, and it works offline. PRIVACY & SUPPORT Privacy policy, FAQ and contact email are on the Support URL page below.