On the Handbook tab, search by the name of a rule, a formula or a keyword. Pick a topic with the chips above the list or show only your starred articles.
Rules and theorems come with a proof or a derivation. “When it applies” and “Common mistakes” show where a rule stops working, and every article has worked examples.
Open the Graphs tab or the graph inside an article and move the sliders: the curve and its key points update as you go.
Open the Solver tab, choose the type of problem and enter your numbers. The app shows every step of the solution and the answer. If a problem has no solution, it says so and explains why.
Open the Practice tab and choose a topic. Problems are generated anew every time; after each answer you see an explanation. Stars and the number of solved problems are kept on your device and can be reset in About.
The Visual tab shows proofs in pictures. Use the arrows to go step by step.
The cheat sheet lists formulas without explanations, for all topics or only for your favorites. The reference screens hold 20 tables, the notation and a guide to solving problems.
Open About and choose the language. English, Spanish, Arabic, French, Hindi, Thai and Russian are available offline. Formulas follow each language’s school notation.
Email ultim8digital@gmail.com with the app version (shown in About), your device and operating-system version, and what you did before the problem appeared. For a mathematical or translation correction, name the article and the exact line. Please do not include passwords or other sensitive information.
The handbook follows standard school treatments of algebra and introductory calculus. It is a study aid and a quick reference, not an official textbook of any school system. Corrections are welcome.
Publisher: Oleg Korunov