Thank you for using our application.
We're sorry and thank you for your long waiting for manual about Android App "Real Calculator".
First of all, we have delivered the user guide first.
Since the PDF file cannot be downloaded from the [FAQ] browser in the app, please copy and paste the above URL into the browser for reference.
We have released more described reference manual in other language, so please wait a few more weeks for the completion for our translation work to English.
(There are applox 70 pages in reference manual... So it takes time )
More information: Manual (User guide) PDF download