Yes, you can use the application with the Samsung S5 as long as the phone you're trying to use it with is compatible with the following technologies: LTE-A, LTE (FDD and TDD), GSM, GPRS, EDGE, WCDMA, HSPA, HSPA+, TD-SCDMA, CDMA (IS-95 to EV-DO Rev B) and WiMAX. These technologies are presented on the official page of the application.
To find additional information, access the app's page on the official website. You will find all the necessary details about the software and the way it works.