NumberEight solves mobile addressability at scale by giving new life to untapped 1st party data. We empower app developers, ad partners, and advertisers to explore the power of mobex (mobile context) to connect with their users in a relevant, impactful, and most importantly, a private way. We do this through our best-in-class mobile AI software, which predicts the live context of a user (e.g. running, commuting) from sensors present in the device, and then packages them neatly into ID-less behavioural audiences (e.g. joggers, frequent shoppers). All computation happens on-device, thus producing a privacy-by-design solution that guarantees a higher regulatory immunity.