Aria Crescendo is a payment platform for subscription- and usage-based businesses. Aria removes billing bottlenecks and allows companies to rapidly introduce and evolve their offerings, bundles, and promotions. Aria Crescendo is the first platform, cloud or on-premise, with the ability to aggregate bills for multiple locations, to make services transient to users as they move from one location to another, to move digital add-on services for “child” entities from simple “parent-pay” to “self-pay” as needed, and to split components of service bundles among payers. All without any custom coding.