iformula vs Quotient Math Drill

iformula (free version) is much more than a simple math equation library app like other apps, it is a math productive learning platform and has become a standard for higher math education at schools and universities ! iformula was specially developed for academic students, engineers, high school students, math course students and for math home schooling and distance learning, as well as a refresher for scientist with higher mathematics skills and all people, who are interested in math. Failing an exam or can't go on with your calculations, because not knowing an equation, belong to the past ! iformula (free version) app includes the following functions: ► Math equation topics, more than 1000 of math equations included: * Areas, Planes * Binomials * Complex Numbers * Constants * Derive * Differential Equation * Fractions * Geometric Constructions * Graphic Functions * Greek Alphabet * Logarithm * Much more math topics & functions are available in formula pro app version - ► App functions: * Full featured equation and math topics search functionality (search for thousands of math topics) * Notes system for important equation notes * Bookmarking system for your favorite equations ! * Full app dual language support: English & German * Search for all topics and categories * Dark mode support ! All math formulas and functions are included in the app no need to download anything ! There is no need of carrying around heavy paper mathematics library books anymore - iformula is your right choice ! This app does not include any annoying advertisement !! That powerful validation, and our reputation for safety, durability, reliability, and ease of use, has also driven our consumer dedication further than ever anticipated. Moving forward, our commitment to "Perfection" remains steadfast: We will never compromise quality. We will continue to invest tremendous resources in the technology and talent necessary to improve our products wherever possible; and we will always strive to deliver maximum customer satisfaction! Exclusion of liability ! Exclusion of warranty and guarantee !

Quotient is the fastest way to sharpen your mental arithmetic. Pick an operation, hit Start, and race through as many problems as you can in 60 seconds. Whether you are a student building fluency, a parent practising with your child, or an adult keeping your mind sharp, Quotient gives you a clean, distraction-free drill with instant feedback and progress tracking. Choose from addition, subtraction, multiplication, division, or a mixed mode that throws every operation at you at random. Three difficulty levels let you grow at your own pace: Easy keeps numbers between 1 and 10, Medium pushes up to 25, and Hard goes all the way to 99. Every drill is timed with a large countdown so you always know how many seconds remain. A green flash confirms a correct answer, a red flash on a wrong one keeps you honest. Your score tallies in real time at the top of the screen. After each session your results are saved automatically. Head to the Stats tab to review your best score, total problems solved, overall accuracy percentage, and your current daily streak. The Levels tab lets you change difficulty and operation at any time. No account needed. No ads. No internet required. All data stays on your device. Features: - 60-second timed drills with countdown ring - Five operation modes: +, -, x, divide, and mixed - Three difficulty levels with adjustable number ranges - Real-time score counter and instant correct/wrong feedback - Stats: best score, accuracy, streak, and total solved - Works completely offline