FLV Converter allows you to convert FLV and F4V files into any of the main video formats, include the most used and popular ones. It comes with a number of presets which optimise the conversion for particular devices or video services. It can handle batch conversion; a real time saver when you have multiple files to convert, and even add subtitles if needed. The app is limited to converting from FLV/F4V, which feels a bit narrow in scope given the price, and some users reported the app failing to load.