Trips to the supermarket will not be broken down per item but (after filling in a quiz at registration), someone who is vegan will get a 40 per cent discount over a carnivore, for example.
Gleisner's five-year goal is to have 100 million users and a $1 billion valuation.
After quitting his job as a Treasury economist, Gleisner developed the original incarnation of CoGo as an app for making ethical spending choices.
For example, if you want to go out for a coffee, it will show you a directory of local businesses that meet criteria like buying fair trade products, or paying a living wage.
That directory still forms part of the app.
And Gleisner says in NZ, it so far boasts more than 2,00 accredited business listings and has had more than 40,000 downloads.
The ex-Treasury man - who returned home to NZ from the UK after the pandemic hit - has a lot of breathing room to develop CoGo, having raised $8 million from backers including the ubiquitous Sir Stephen Tindall, NZ Growth Capital Partners (the Crown agency formerly known as NZVIF), Andrew Thorburn (ex CEO, National Australia Bank) and BrewDog boss James Watt.
Ultimately, he wants to turn a profit by offering green products and services for assessment via CoGo, then taking a small cut if you, say, change your power plan or buy a certain model of EV after its featured in his app.