Gleichungssysteme 4+

Rate of the algorithm’s implementation

Good is that this app produces a correct final solution.
Unfortunately I consider the implementation of the Gauss-algorithm as poor, since the algorithm has not as target to keep integers only as long as possible during the steps. As a consequence, the implemented algorithm is not a method that students should apply in practice, since a it produces sources of simple calculation mistakes by the forced use of fractions/decimals. In the actual way, the app is mostly suitable to check the final result, but this also could be achieved by using WolframAlpha. Hence, I do not recommend the app’s purchase with this implementation. I would recommend if the implementation would be changed to remove the mentioned weakness.
I would be happy if the author could change the implementation. There are easy ways from Linear Algebra to achieve this target.