A free app for Android, by samson mbugua.

This app has a collection of standard 6th grade math exams, which are prepared by the Korea Education Standards Organization. It includes the most important topics in mathematics.

You can expect to see topics such as:

• Algebra
• Trig
• Gram
• Geometry
• Statistics
• Algebraic expressions
• Functions
• Calculus
• Integration
• Differentiation
• Exponents and logarithms
• Exponents and square roots
• Fractions and decimals
• Coordinate geometry
• Conic sections
• Conic transformations
• Arithmetic
• Arithmetic operations
• Matrices and transformations
• Probability
• Sequence and series
• Analytics
• Complex number
• Finite and infinite numbers

The mode of the questions is a straight-forward manner. There are no complicated questions, but rather simple ones that require you to use your own thinking and judgment. The questions also include a full explanation, and you can refer to it when you answer the question.