The future of mobile payments contains real excitement: not around simple convenience, but rather the return of purchase history back to the hands of the user. While the commercial implications are of course enormous, the geotechnical potential – employing an artifact of the payments process – is huge. This brief talk aims to provide an overview to some of that hugeness, and discuss what how the game is taking shape on the table. A single mobile payment records the time, date, and place of purchase (like any purchase today), but doing so on a mobile device provides the means to record that transaction and re-purpose it for further user benefit outside the commercial domain. The next generation of geo applications will all be ‘Big Data’ apps: using data for a purpose orthogonal to its purpose at collection, and enriching it to become more than a sum of its parts. We’ll see mobile apps that check-in, comb for deals, and geolocate people with every purchase, to start.