Comet (formerly SigmaScript) is a development environment for the Lua scripting language for Android with built-in Lua scripting engine. It is mainly dedicated to numerical computing and data analysis. Features: Built-in Lua scripting engine, numerical and data analysis modules, syntax highlighting, included Lua samples and code templates, output area, save/open to/from internal or external card, etc. The main goal of Comet is to provide an editor and scripting engine for Lua on Android, particularly suitable for numerical computing and data analysis. It includes modules for linear algebra, ordinary differential equations, data analysis and plotting, sqlite databases, etc. With Comet, you can learn programming on your smartphone or tablet and develop algorithms with one of the most elegant and fast scripting languages.