Card.io is a gamified fitness tracker app that transforms your outdoor cardio into a fun, social, and addictive team-based turf war. Whether you're using it as a running app, workout app, or biking app, Card.io makes your exercise routine exciting. Here's how it works:

Join a Team - Join or create teams with your friends, brands, or communities, making Card.io the ultimate social fitness app. Compete in virtual running events, group running challenges, and more to build your fitness community.

Claim Your Turf - Turn any outdoor cardio, whether running, walking, or biking, into claimable territory in your city. This outdoor fitness game lets you track running routes and steal or defend turf from other players, regardless of your mile pace or calories burned.

Track Your Progress - As you claim turf, this exercise tracker app logs essential stats like distance, mile pace, and calories burned, making it a reliable fitness tracker. Achieve your fitness goals while having fun with this unique cardio game.

Rise Up The Ranks - The more turf you claim, the higher you'll climb on your team's leaderboard. Drive your team to the top in this competitive running app for special in-game and real-life rewards and recognition.

Real-World Rewards - Complete fitness challenges or rise on the leaderboards to win prizes, free gear, and exclusive offers. This fitness tracker app rewards your dedication to health and fitness.

Customize Your Experience - Personalize everything from your avatar and team to how you claim and defend turf. Whether you're training for a marathon or just enjoying outdoor fitness, Card.io is the workout app that lets you tailor your experience.

Competition - Embrace the competitive spirit with features like taunting other players, receiving notifications when your turf is stolen, time-sensitive challenges, and team vs. team gameplay. Perfect for running clubs and those who thrive on competition.

Collaboration - Teamwork is key in this fitness challenge app. Strategize with in-game chat, enjoy bonuses when team members claim turf together, and participate in group running events. Card.io is the social fitness app that brings running with friends to a new level.

Whether you're looking for the best running app, a fun running app, or a fitness tracker for marathon training, Card.io is the all-in-one outdoor cardio app that turns your workouts into a thrilling adventure.