Bali has a special procedure for writing in the writing of the Balinese language called Balinese script. In the field of technology to preserve the use of Balinese script needed a tool to help you to understand the writing language using the script Bali. The tools mentioned include computers and smart phones. Efforts to computerize been done before on a computer that is by entering Balinese script in standard Unicode characters and generate Bali Simbar font that can beused when using MS. Word in a way to install these fonts. But the font Bali Simbar still has a few flaws in the accuracy of determining the conversion and the user must use really understand about Balinese script such as the use of the letter "e" with the letter "è". In making a conversion application latin letters into balinese script android based its design concept and planning through data collection. Unified Modeling Language (UML), Conceptual Database, and then implement it. With the conversion application designed to Latin letters into balinese script which can run on smartphones that use the Android operating system version 2.3 can help users to convert Latin letters into Balinese script correctly, and the application also comes with the introduction of various balinese script, so any user who uses this application can directly learn the balinese script.