Calculator by E MOBILE is a free Android application that offers both basic arithmetic and advanced mathematical functions. With this app, you can perform simple calculations such as addition, subtraction, multiplication, and division, as well as more complex operations like trigonometric, logarithmic, and exponential functions.

One of the most useful features of this calculator is the ability to save your calculation history. You can also store a value after calculating, making it easy to use the result in future calculations. Another helpful feature is the ability to compare your current expression to past calculations, which can be a real time-saver.

Overall, Calculator by E MOBILE is a reliable and easy-to-use app that is perfect for everyday use. Whether you need to quickly calculate a tip at a restaurant or perform complex mathematical operations, this app has got you covered.