Alter Eco is an automatic carbon footprint calculator which allows you to track your transport and food emissions. Constant use of the app and more eco-friendly behaviours are rewarded with achievements and points, which can be spent to build a 3D virtual forest.

Your daily emissions are compared with the UK average. When you go beyond that, your forest will get polluted and other visual clues will be present.

All the data is stored locally on the device and it is not uploaded anywhere. If you wish to remove your information, simply uninstall Alter Eco.