Numerical Solver vs DeckRecall

Numerical Solver is a mobile-first numerical mathematics tool for solving equations, differential equations, and analyzing mathematical functions. Solve equations numerically Solve algebraic equations with one or more variables, including nonlinear equations and systems of equations. • Solve equations numerically • Solve nonlinear equations and systems • Find real and complex solutions • Evaluate solutions at specific values • Solve equations with a single variable for free, with no limits Solve ordinary differential equations Numerical Solver supports linear and nonlinear ordinary differential equations, including initial value problems (IVPs), boundary value problems (BVPs), and systems of ODEs with multiple dependent variables. • Solve initial value problems • Solve boundary value problems • Solve linear and nonlinear ODEs • Solve systems of ODEs • Compute the solution at a given value of x • Plot numerical solutions Visualize ODE systems For systems of ODEs, choose which variables to plot against each other and explore relationships and trajectories within the system. For example, you can solve the Lorenz system and visualize its characteristic trajectories through different combinations of variables. Differentiate equations Differentiate equations with respect to x or y and evaluate the derivative at specific values. • Differentiate equations with respect to x or y • Evaluate derivatives at given x and y values • Work with multivariable expressions Plot functions and data Plot mathematical functions or visualize a list of x,y data points. • Plot functions • Plot lists of data • Explore numerical results visually Numerical computing on the go Numerical Solver is designed to give you practical numerical tools wherever you are, without requiring an internet connection. Use it for mathematics, engineering, science, education, or whenever you need to solve and visualize numerical problems. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

DeckRecall helps you remember anything for good with real spaced repetition — it shows each card exactly when you're about to forget it, so you study less and retain more. WHAT IT DOES • Real SM-2 spaced repetition: every card is scheduled by your own memory, not a fixed daily count. • Start in seconds: pick a curated starter deck at onboarding (Spanish Essentials, World Capitals, Human Body Basics, Common Idioms, Mental Math Tricks) and review your first cards right away — no empty first day. • Build your own deck: write your own front-and-back cards and they're scheduled with the same SM-2 engine. • Just rate how it went: flip a card and tap Again, Hard, Good, or Easy — DeckRecall does the scheduling math. • See your progress: a review heatmap, per-deck new / learning / mastered bars, and your daily streak. • Deck library: browse and add curated starter decks any time, and open any deck to study it on its own. • Review forecast: a 14-day forecast shows how many cards come due each day, so nothing piles up unseen. • Daily reminder: an optional reminder at a time you choose, with live copy from the real engine ("12 cards due · 5-day streak"). PRIVATE BY DESIGN Your decks and review history live on your device. No account to create. HONEST BY DESIGN Core features are free — every starter deck, the full SM-2 review loop, progress tracking, and up to 10 of your own custom cards. DeckRecall Plus is an optional auto-renewing subscription that removes the custom-card limit so you can build unlimited cards and decks. Clearly priced, cancel anytime. Subscription: auto-renews unless canceled at least 24 hours before the period ends; payment is charged to your Apple ID at confirmation; manage or cancel in your App Store settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://deckrecall.com/privacy