PhysKey Custom vs Formula Kit

A custom keyboard built for science and math enthusiasts. Say goodbye to the hassle of symbol input and streamline your typing on mobile. Features Type Greek letters (α, β, γ...) directly from the key layout Access frequently used physical constants and units in one tap Full coverage of math symbols (∫, Σ, √...) Works in every app — notes, social media, and more Perfect for writing science reports, logging experimental data, or chatting while studying. No more typing out "alpha" and hunting through conversion suggestions. Give PhysKey a try — simple, intuitive, and built for the way you think.

Your pocket LaTeX formula editor, whether it's writing academic papers, lesson preparation notes, or organizing science and engineering notes, FormulaKit can help you efficiently input, edit, and export formulas. Core Features: LaTeX real-time rendering is based on the KaTeX engine, with input visible immediately. Supports over 400 preset formula templates, covering 14 disciplines including algebra, calculus, linear algebra, probability and statistics, physics, chemistry, and computer science. Exclusive auxiliary keyboard is a custom keyboard optimized for formula input, with clear symbol panel classification (Greek letters, operators, sets, arrows, matrices, etc.), precise cursor dragging, greatly improving input efficiency. Image export, one click save formula as high-definition image to album, convenient for inserting documents, PPT or sharing with others; Code export, export Latex, MathML, HTML, SVG code. Formula library and classification management support creating custom folders and categorizing to save formulas. Pre set 405 classic formulas out of the box, commonly used formulas can be easily saved with just one click. History and preview automatically save editing history, supporting quick thumbnail browsing. Full screen preview mode, automatically prompted after copying the formula. highlights Completely offline - no network required, all functions run locally Privacy priority - Formula data cannot be exported from the device Lightweight and efficient - fast startup, smooth rendering Pure offline payment - one-time purchase, permanent use Target Audience Students (high school/university/graduate) Teachers and Professors researcher Engineers and technical writers Anyone who needs to input mathematical formulas Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/