Apple plans to allow the development of an app ecosystem around its biometric Face ID authentication system.Apple plans to allow developers to take certain facial data off the phone after seeking customer permission and agreeing to terms that they won't sell the data to third parties, according to a Reuters report.The news agency cites the details are based on a contract it has seen, which adds that developers will only have access to the facial mapping data and not the mathematical model used to unlock the device with Face ID.This week, the American Civil Liberties Union has raised questions over how “effectively” Apple can enforce certain privacy rules surrounding its face scanning system.The ACLU is concerned that certain pieces of facial data can be taken off the iPhone X by developers who seek to create entertainment features with the new smartphone's facial software. “The privacy issues around of the use of very sophisticated facial recognition technology for unlocking the phone have been overblown,” Jay Stanley, a senior policy analyst with the American Civil Liberties Union told Reuters. “The real privacy issues have to do with the access by third-party developers.”