E Widget Calc app for iPhone and iPad

Hi, I’m 100% individual developer! :D
This app is the simplest & easiest calculator.

Technique Summary
1. Automatically calculating at the widget after copy the documents.
2. You can use typing as usual.
3. The simplest& modern design of widget& APP UI.
4. The basic operation of calculator. Plus, convenient operation
(Erasing a letter individually, preservation of calculated documents.)

Explanation
I made this widget calculator with accumulate know-how which I learned for 1 year while I develop my own app.
You guys are going to surprise once because of the display which has insight, and then surprise twice for the fast calculating process.

Operation list
-Calculating documents which is copied in the widget.
-Calculating documents in the widget with typing.
-Backing iphone& ipad
-Intuitive display UI
-Percentage (%) calculation
-Erasing a letter individually
-Broad range of font size
-Expert the result of calculation to other APP