Company Allen Robinson created these great apps:
Factorise - algebra polynomials, QuadSolve - Solve quadeatic equations by factorising, Expand, Solve Linear Equations, Integers – add subtract multiply divide negative numbers, Pythagoras Theorem, Simultaneous Equations - substitution, elimination, and problem solving, Xr Fractions, Xr Percent, Angle Geometry, Parallel Geometry, Substitute - in algebraic expression, Scale Reading, Decimals, Xr Numbers, Xr Area – Perimeter, Area and Volume Formulas App, Circle Geom, Trig 1, Linear Sequences, Linear Graphs, Algebra Start - variables powers simplify solve, and others..
