SimpleX is described as 'A Plex client for the new Apple TV' and is an app in the Video & Movies category. There are more than 50 alternatives to SimpleX for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad. The best alternative is Kodi, which is both free and Open Source. Other great apps like SimpleX are Plex (Freemium), Stremio (Freemium, Open Source), Emby (Freemium) and Universal Media Server (Free, Open Source).
Plex bridges the gap between your computer and your home theater, doing so with a visually appealing user interface that provides instant access to your media. Plex can play a wide range of video, audio and photo formats as well as online streaming audio and video.
Media center allowing to watch movies, series, YouTube channels instantly. You can watch in HD, with subtitles, and easily cast any file to TV through DLNA, Chromecast, AppleTV! Stremio also gives you notifications for new episodes / movies.
Emby, formerly Media Browser, is a media aggregator plugin for Media Center that takes your recorded, digital, or ripped media and presents it in a simple, easy to use interface. Emby prides itself on delivering a fast, intuitive, media rich experience for the whole family.
Universal Media Server is a media server capable of serving videos, audio and images to any DLNA-capable device. It supports any device capable of DLNA and runs on all major operating systems: Windows, OS X and Linux.
Ignite your video content with Infuse – the beautiful way to watch almost any video format on your iPhone, iPad, and Apple TV. No need to convert files! Infuse is optimized for iOS 12, with powerful streaming options, trakt sync, and unmatched AirPlay & subtitle support.
Serviio is a free media server. It allows you to stream your media files (music, video or images) to any DLNA-certified renderer device (e.g. a TV set, Bluray player, games console) on your home network. Basic features * DLNA 1.