Google Trix! - Waterfall Charts on google spreadsheet

Waterfall charts are very common. You see them everywhere. They let you visualize a series of Business events, drivers or activities to explain 2 data points. An example below is a 2013 Revenue waterfall for a Business. It explains where the incremental revenue in 2013 was generated from.
There are tonnes of excel tutorials out there, but here is one for google spreadsheets.

Distraction free writing on Android. Review of Minimalistic text editors

Back when I owned an iPhone, not too long ago, I stumbled across PlainText, a free app by the Writeroom team. It was a barebone minimalistic writing app which would sync with dropbox, enabling me to continue writing cross device and cross platform.

That's when I discovered art of minimalistic distraction free writing. All you get is a full screen of blank canvas. No intruding buttons, plethora of menu options or distracting bright colors. As a writer, you focus on simply transforming ideas into words.

When I moved to the Android platform, I was looking for a similar alternative.