Napkin Calculator and Notepad is described as 'Napkin is a unique mix between a notepad and a calculator. Doing quick calculations on your phone has never been easier!' and is a Calculator in the education & reference category. There are more than 10 alternatives to Napkin Calculator and Notepad for a variety of platforms, including Web-based, Mac, Windows, Linux and Self-Hosted apps. The best Napkin Calculator and Notepad alternative is Numi, which is free. Other great apps like Napkin Calculator and Notepad are Soulver, OpalCalc, NoteCalc and Calculist.
Qlate is a combination of a calculator and a notepad for dynamic calculations. It's more powerful than a simple calculator and more intuitive than an Excel sheet. All that power and intelligence is wrapped behind a beautiful, clean and minimal user interface.
Wakari, now part of Anaconda, provides web-based Python data analysis via embedded iPython notebooks.
