BottleZero

BottleZero helps you cut down on single-use plastic bottles by making every refill count.

Every time you refill a reusable bottle instead of buying a plastic one, log it with one tap. BottleZero turns that choice into your real impact — how much plastic you kept out of landfills, how much CO2 you prevented, and how much money you saved.

FEATURES
- One-tap logging with daily goals and streaks
- Real impact stats: plastic avoided, CO2 prevented, money saved
- A live map of nearby water refill fountains using OpenStreetMap
- Badges, levels, and unlockable perks as you save more
- Friend challenges with join codes and leaderboards
- A community counter showing what everyone using the app has saved together
- A new plastic-reduction fact every day
- Share your impact as a picture card
- Works offline, syncs across devices when signed in

BottleZero was built as a solo student project for the Congressional App Challenge. It has no ads and no third-party trackers — see the in-app Privacy Policy for exactly what is and is not collected.