Apps and on-demand services are revolutionizing dozens of industries, including beauty and wellness. These new on-demand options provide an unprecedented level of flexibility, immediacy, and convenience, and many established industry leaders are also adding or partnering with on-demand services. Leading the trend: Zeel in the U.S. or Urban Massage in the UK, both on-demand massage industry leaders, and manicure service Manicube, recently acquired by famed Elizabeth Arden Red Door Spa.