Style file and iOS TexPad app

I am trying to typeset my project using TeXpad app on my iPhone 11 (iOS 13.6) and I wish to use my own style. I tried to put my style file mypaper.sty into linked iCloud folder, and into local iPhone folder, and in the special directory Texpad-Custom-Packages directory. In any case, it says

LaTeX Error: File 'mypaper.sty' not found

Here is the minimal working example:

documentclass{article} 
usepackage[T2A]{fontenc}
usepackage[cp866]{inputenc}
usepackage[english,russian]{babel}
usepackage[tbtags]{amsmath}
usepackage{amsfonts,amssymb,mathrsfs,amscd,comment}
usepackage{amsfonts,amssymb,mathrsfs,amscd}
usepackage{datetime}
usepackage[hyper]{mypaper}

begin{document}

title{My title}

author[Me]{Me}
address{My adress}
email{My email}
date{21.06.2020}
maketitle
markright{Title}
begin{fulltext}
begin{abstract}
My abstract
underbar{today}
end{abstract}
begin{keywords}
My KW
end{keywords}
setcounter{tocdepth}{1}tableofcontents
footnotetext[0]{My foot}
section{Section name}label{s1}
subsection{}label{s1s1}
end{fulltext}
end{document}

I tried to change the way to my file in usepackage[hyper]{mypaper}, but also no results.