This is the most easy-to-use and advanced scientific calculators out there with features including:
log, sin, cos, tan, clear, sqrt, asin, acos, atan, pi, ln, ee, parenthesis, division, squares, multiplication, exponents, subtraction, power of ten, addition, del, modulus (%), and the ability to evaluate a whole expression.

Recent changes:
buttons now take up vertical space the right way for bigger screens.