Open-source, Interactive, Expressive, Algebraic Calculator.
I originally made this application to help myself to solve the exercises from "Elementary Linear Algebra" by Ron Larson.
Its algebraic which means you can use variables in expressions and it will evaluate into its final form.
Its interactive. You will find writing expressions fun in this application. For example it supports limited handwriting where you can handwrite integers in matrix( which was 90% of job when I was solving practices from the book). Also you can type simple expressions like -4^3, 3x, 5/x, x+y.
This is completely open source. You can change the app, bug report, feature request in https://github.com/ingun37/mat4ipad