Know Your Impact,
Reduce Your Footprint

CO2Mate is a personal carbon footprint tracking app for iOS and Android. You log daily activities across transport, food, energy, and shopping, and the app calculates your estimated CO2 emissions. It provides eco tips, weekly challenges, and comparisons to national and global averages to help you understand and reduce your environmental impact.

We use widely accepted emission factors from sources like the IPCC, EPA, and DEFRA. For example, driving a car produces approximately 0.21 kg CO2 per km, a meat meal averages 3.3 kg CO2, and electricity is about 0.5 kg CO2 per kWh. While individual circumstances vary (car efficiency, energy mix, etc.), these factors provide a reliable estimate of your personal carbon footprint.

Free users can track three categories: Transport (car, bus, train, bike, walk, flights), Food (meat, fish, vegetarian, vegan meals), and Energy (electricity, natural gas, heating oil). Premium users also get the Shopping category (clothing, electronics, package deliveries) plus detailed subcategory breakdowns.

Yes! The free plan lets you track 3 activity categories, get weekly summaries, access 5 eco tips, and view 7 days of history. For the complete experience including all categories, daily/weekly/monthly reports, 50+ eco tips with challenges, carbon offset suggestions, and unlimited history, you can upgrade to Premium for $1.99/month.

Absolutely. Your carbon footprint data is stored securely using Supabase with row-level security (RLS), meaning only you can access your own records. All data is transmitted over HTTPS. We do not sell, rent, or share your personal information with third parties. Payment processing is handled entirely by Apple and Google — we never see your credit card information.