(Reuters) – Apple Inc will let software developers include virtual-currency transactions in their applications, paving the way for new forms of money to appear on iPhones and iPads. Apps may facilitate transmission of approved virtual currencies provided that they do so in compliance with all state and federal laws for the territories in which the app functions, Apple said in an update to its App Store review guidelines. Apple spokeswoman Kristin Huguet did not immediately respond to an email seeking more information. Virtual currencies are not backed by any government or central bank and are bought and sold on a peer-to-peer network independent of central control.