Downloadable and/or recorded software development kit (SDK) for ultrasonic data communication and transfer; downloadable and/or recorded computer software that communicates, transfers and receives data over inaudible sound waves for use in proximity-based authentication, contactless verification, and secure offline data exchange between devices; downloadable and/or recorded computer software for enabling ultrasonic communication between mobile devices and hardware endpoints for verification, identity authentication, access control, proximity-triggered user engagement, and trade, business and commercial dealing exchanges; downloadable and/or recorded computer software for physical proximity verification of individual users and third parties, frictionless proximity authentication of individual users and third parties, contactless trade, business and commercial dealing exchanges between users and third parties, secure proximity trade, business and commercial dealing exchanges between users and third-parties, verification of trade, business and commercial dealing exchanges between users and third parties, proximity-based engagement between individuals and third-parties, trade, business and commercial dealing exchange verification between parties, controlling of fraud during trade, business and commercial dealing exchanges, controlling of trade, business and commercial dealing exchanges between parties, authenticating and verifying information of parties during trade, business and commercial dealing exchanges, allowing users to control their autonomy and independence during trade, business and commercial dealing exchanges, user loyalty solutions, providing tokenized and customized incentive offers for trade, business and commercial dealing exchanges, and interaction, engagement, recognition and dealings between individuals and third parties; downloadable and/or recorded computer software for prompting secondary actions performed by the software which are pre-determined by users, such as wireless connectivity, user authentication, pairing and synching of wireless devices; downloadable and/or recorded computer application software for mobile phones, namely, software for wireless interaction with mobile devices via inaudible and audible sound signals based on a number of factors, in particular, user location, user preferences, user behaviors, user demographics, user gaming triggers such as points or badges, and other activities that may take place on or with a mobile device

Software as a service (SaaS) services featuring software that is a development kit (SDK) for ultrasonic data communication and transfer; software as a service (SaaS) services featuring software that communicates, transfers and receives data over inaudible sound waves for use in proximity-based authentication, contactless verification, and secure offline data exchange between devices; software as a service (SaaS) services featuring software for enabling ultrasonic communication between mobile devices and hardware endpoints for verification, identity authentication, access control, proximity-triggered user engagement, and trade, business and commercial dealing exchanges; software as a service (SaaS) services featuring software for physical proximity verification of individual users and third parties, frictionless proximity authentication of individual users and third parties, contactless trade, business and commercial dealing exchanges between users and third parties, secure proximity trade, business and commercial dealing exchanges between users and third-parties, verification of trade, business and commercial dealing exchanges between users and third parties, proximity-based engagement between individuals and third-parties, trade, business and commercial dealing exchange verification between parties, controlling of fraud during trade, business and commercial dealing exchanges, controlling of trade, business and commercial dealing exchanges between parties, authenticating and verifying information of parties during trade, business and commercial dealing exchanges, allowing users to control their autonomy and independence during trade, business and commercial dealing exchanges, user loyalty solutions, providing tokenized and customized incentive offers for trade, business and commercial dealing exchanges, and interaction, engagement, recognition and dealings between individuals and third parties; software as a service (SaaS) services featuring software for prompting secondary actions performed by the software which are pre-determined by users, such as wireless connectivity, user authentication, pairing and synching of wireless devices; software as a service (SaaS) services featuring software for mobile phones, namely, software for wireless interaction with mobile devices via inaudible and audible sound signals based on a number of factors, in particular, user location, user preferences, user behaviors, user demographics, user gaming triggers such as points or badges, and other activities that may take place on or with a mobile device