Simple Calculator app analytics for September 9

This is a perfect tool for daily calculations. Thanks to a big, contrastive display and large colourful buttons one can use it even on devices with a small screen. Because of tiny application size, it launches really fast and it can run smoothly on low-end smartphones. Last but not least, it is completely free and without ads. Available functions: - addition - subtraction - multiplication - division - percentage - square root - memory - constant mode