Once booted, the Vanilla cleanup tool will add a carrot symbol and a dot to your Menu Bar. The app icons that are between the two new symbols will be hidden. One can drag icons between them by holding down the command key and the ones outside of it will show up on the right.
The app is free but one can also pay $4.99 (Rs 350 approx) for upgrading to its pro version. The pro version is compatible with light and dark menu bars and automatically hides icons again after five seconds. One nifty trick that the pro users will get is the keyboard shortcut to toggle the hidden icons.