Álgebra Preuniversitario is a free Android application that allows you to learn Pre-University Algebra without an internet connection. Developed by ALVE, this app is an excellent tool for students who want to improve their algebra skills.

The app's user interface is straightforward, and it provides a comprehensive explanation of algebraic concepts. The app covers topics such as algebraic expressions, equations, inequalities, and functions. It also includes exercises for each topic to help users practice their skills.

Overall, Álgebra Preuniversitario is an excellent app for students who want to improve their algebra skills. Its offline feature makes it accessible to users who do not have an internet connection. However, it would be great to see the app expand its content to include more advanced algebraic concepts in the future.