How big (or small) is the iNAP? CC Chen September 07, 2022 14:57 Updated The iNAP is the size of your smartphone and twice the thickness. Related articles How much does iNAP cost? What are the components of iNAP One? How does the iNAP work? Can iNAP replace the CPAP that I currently use or tried using? What is iNAP?