% Phone or e-reader screen: a narrow page (9:16), one-sided,
% minimal margins, no title page.
\documentclass[10pt,oneside]{article}
\usepackage[paperwidth=90mm,paperheight=160mm,left=5mm,right=13mm,
  top=6mm,bottom=11mm,footskip=6mm,marginparwidth=9mm,marginparsep=1.5mm]{geometry}
\input{apology-common}
\setlength\emergencystretch{3em}\tolerance=2000 % narrow measure
\begin{document}
\heading
\input{apology-text}
\end{document}