SubRenderer is a subtitle converter application. You can convert your .srt subtitle files into pre rendered VobSub (.sub, .idx) files. Also if you imported the video as well SubRenderer will merge that rendered subtitle into your video file. So you can play that video on any device, even they don't support for unicode characters.
Download for Android: https://play.google.com/store/apps/details?id=lk.ysk.subrenderer
.NET Framework 3.5 or highier
If you want to compile the software yourself, You can just download the official repo (https://github.com/yohan9911/SubRenderer) from GitHub and compile it using Visual studio 2012 or later version.
Otherwise you can just download official release from this link https://github.com/yohan9911/SubRenderer/releases
MKVToolNix - License: GNU Lesser General Public License v3 (see https://www.gnu.org/licenses/lgpl-3.0.txt) - URL: https://techbase.kde.org/Projects/Oxygen
Son2VSub - Alain Vielle (vielle@bigfoot.com) - Petr Vyskocil (yusaku@anime.cz)
License: GNU General Public License v3 (see COPYING.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
URL: https://github.com/yohan9911/SubRenderer