Commons

Commons began life as Joro, founded by Sanchali Seth Pal after her carbon-footprint spreadsheet outgrew the kitchen table, and relaunched as Commons, the climate personal-finance app. Link your cards and it estimates the emissions of what you actually buy, then suggests and rewards lower-carbon swaps, from transit to secondhand, with cashback at sustainable brands. It moves climate action to where decisions genuinely happen, the checkout. It is the carbon-tracking entry in our apps collection.