: This is frequently a tag used by third-party "IPA" library sites to indicate a specific build or source (often associated with the "Bio" or "Bfi" sideloading communities). iSTB - App Store - Apple
: Indicates the minimum operating system requirement is likely iOS 11.0 or higher. : This is frequently a tag used by
: Often refers to a "tweaked" or sideloaded version of the app that may have specific UI modifications or hidden developer settings. and M3U playlists.
The iSTB app is a popular IPTV client used to play content from Stalker Middleware, Xtream Codes, and M3U playlists. : This is frequently a tag used by