WildSkill vs Calculus Formulas

Would you know what to do if you got lost in the wilderness? Most people wouldn't. WildSkill changes that — one short lesson at a time. Learn 70 field-tested survival skills across 8 essential topics: fire-making, shelter building, water procurement, navigation, food and foraging, first aid, knots, and signaling. Each lesson takes just a few minutes and ends with a quiz to make sure it sticks. No fluff. No filler. Just the knowledge that matters when it matters. WHAT YOU'LL LEARN - Start a fire with friction, a ferro rod, or flint and steel - Build shelters that protect from wind, rain, and cold - Find, purify, and store drinking water - Navigate by stars, terrain, and compass - Identify edible plants and avoid deadly look-alikes - Treat wounds, fractures, burns, and bites in the field - Tie the 6 knots that handle any survival situation - Signal for rescue from the ground or air HOW IT WORKS Pick a topic. Read a short lesson with clear diagrams and real-world examples. Take the quiz. Pass, and the next lesson unlocks. Each topic builds from basics to advanced techniques — no jumping around or guessing where to start. BUILT FOR DAILY PRACTICE - Daily streaks keep you consistent - Earn ranks from Novice to Master Survivalist - Unlock topic badges by completing every lesson in a subject - Milestone celebrations at 5, 10, 25, 50, and 70 lessons - Track your week at a glance WORKS OFFLINE Every lesson, diagram, and quiz is built into the app. No internet required. Learn on a plane, on a trail, or in the middle of nowhere — exactly where this knowledge matters most. WHO IT'S FOR - Hikers, campers, and camping enthusiasts who want to be prepared - Preppers and beginners building real-world preparedness - Anyone curious about offgrid and outdoor survival - Parents teaching kids practical skills - Anyone who'd rather know and not need it than need it and not know it 70 lessons. 210 quiz questions. 8 survival topics. Zero excuses. Download WildSkill and start your first lesson today.

CalcRef is the complete calculus reference and study tool built for students. Whether you are preparing for AP Calculus, college exams, or reviewing core concepts, CalcRef puts every formula, table, and practice tool you need in one offline app. FORMULAS Browse over 100 calculus formulas across 8 topics: Limits and Continuity, Derivatives, Applications of Derivatives, Integrals, Techniques of Integration, Applications of Integrals, Sequences and Series, and Parametric, Polar, and Vectors. Every formula includes LaTeX-rendered notation, a plain-language description, conditions for use, and variable definitions. Computational formulas include a built-in calculator with step-by-step solutions. REFERENCE TABLES Six tables provide instant access to the essentials: - Derivative Rules (power, trig, exponential, logarithmic, inverse trig) - Integral Formulas (standard antiderivatives with conditions) - Trigonometric Identities (Pythagorean, double angle, half angle, sum/difference) - Convergence Tests (ratio, root, integral, comparison, alternating series) - Maclaurin Series (common expansions with convergence intervals) - Unit Circle (sin, cos, tan at standard angles in degrees and radians) PRACTICE Test your knowledge with flashcard-style quizzes. Each round presents 10 cards from a chosen topic or a mix of all topics. Flip to reveal each formula, mark it correct or missed, and review your score. Track your progress over time with per-topic stats and quiz history. TOOLS A unit converter covering 16 categories (length, area, volume, mass, force, pressure, temperature, energy, power, velocity, acceleration, density, viscosity, torque, flow rate, and angle) is accessible from any screen. A database of mathematical constants provides precise values for pi, e, the golden ratio, and more. BUILT FOR STUDYING Bookmark formulas to Favorites for quick access. Search finds any formula or constant as you type. Calculation history logs every result. Create and save your own custom formulas. Choose dark or light theme, set decimal precision, and toggle scientific notation. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/