1. CauseWorld (iPhone and Android): This app works like a digital loyalty card. “Check in” with your phone when you walk into stores and businesses and instead of collecting hole punches in a card, you rack up karma points that can be used to donate to your favorite cause. For one karma point, Carbonfund.org will offset two pounds of CO2.
2. Green Gas Saver (iPhone): You may have heard taking it easy on turns and acceleration will improve your car’s fuel efficiency, but it’s hard to always remember that behind the wheel. This app allows you to snap your iPhone or iPod Touch into a dashboard mount and receive a fuel efficiency score at the end of your trip. Green Gas Saver is also popular tool for the terrified parents of new teenage drivers. 3. Find Green (iPhone and Android): Formerly known as 3rdWhale, Find Green helps you do just that. The GPS-powered app pinpoints your location and directs you to nearby green and sustainable businesses. With over 60,000 listings, you can flip through everything from retail to food to leisure and then decide if you want a location that’s in driving, biking or walking distance. 4. GoodGuide (iPhone): For conscientious consumers puzzling over two seemingly identical dish soaps, the GoodGuice app allows you to scan the barcode on over 50,000 products to instantly receive detailed ratings for the health, environment and social responsibility record for food, toys, personal care and household products. You can also use the app to pull up ranked lists for products, like the 10 best air fresheners. 5. Energy Savings Calculator (Android): If you’re trying to decide whether it’d be worth it to buy new appliances now or wait until they really fall apart, you can use the Energy Savings Calculator app as a tie-breaker. Punch in a few fields (energy used in watts, hours used a day, etc.) for your old appliance and the new one, and the app calculates a savings summary report with week, month and yearly savings as well as return on investment time for money spent on new appliances.