Google Calculator is one of the most loved calculators by us. It provides instant result to the mathematical operations as well as its available on almost all stock Android devices. This wasn't perfect as a calculator though. Why? It did not have 'show history' feature as most of other calculators had. This was a big problem to be looked into as it was the most essential feature for every user. And it was easiest feature Google could add in it's app. Yet Google wasn't seem to be looking into it and this resulted in bad reviews on play store. But on Jan 11, 2017; this feature was added by Google and now the operation history in the app can be seen by swiping down from the top. Also another feature which was needed to be added was MS, MR, M+, M-. The MS (Memory Store) button copies the number from the screen to the memory. The MR (Memory Recall) button brings the memory value back to the screen. M+ and M- add or subtract the screen value from the memory val