SLIC is an evidence-based decision supporting system on the (surgical) treatment of subaxial cervical spine injury. It is based on the SLIC scale described by Vaccaro et al (Spine, 2007). SLIC 3 has been developed and tested by a neurosurgeon, and incorporates CE-marked technology for risk minimization inspired by the European MEDDEV guidelines and FDA guidance on mobile medical applications. Further, SLIC 3 has been updated for iOS 8 and higher, and all new iPhone screen dimensions. Screenshots