PariDroid app
PariDroid is Science & Education tool that is open source under the GPL-3.0-or-later license. PariDroid is a native port of PARI/GP to Android.PARI/GP is a widely used computer algebra system designed for fast computations in number theory (factorizations, algebraic number theory, elliptic curves...), but also contains a large number of other useful functions to compute with mathematical entities such as matrices, polynomials, power series, algebraic numbers, etc., and a lot of transcendental functions.