Three programs in particular run on Windows, iPhone and Android and have synchronization features across those platforms. Logos does the best job because you can save highlights and notes in any Bible resource. The others are limited to saving bookmarks, notes and Bible only highlights. So these three apps are in bold. The four Windows apps that are underlined can run off flash memory and are truly portable. Being able to carry the Word in your pocket is very valuable, especially in this day and time.