Move more. Unlock more to learn.
Your Mayor brings you 24 short cardiovascular lessons and 72 quiz questions. More unlock through qualifying cardio days. Lessons, quizzes, explanations and private best scores stay free.
A cardio app that makes movement rewarding
Move your body.
Move your body.
Build your world.
Cardia World is a cardio motivation app created by a physiology professor. Record walking, running, cycling, and other daily cardio to grow a 3D world on iPhone and iPad—from your first home to neighborhoods, cities, and an entire planet.
Apple Health workout sync
Private by design
Built at your pace
+1 Build Day
15 min qualifies
Next update · Version 1.1.36
Your Mayor has more to share.
Our latest update is in Apple review. These additions arrive with version 1.1.36 after approval. Start building today, then update to meet your Mayor, learn about your heart and explore more with Pro.
A little personality above HQ.
Elect and name a human or pet leader after four qualifying cardio days. Mix clothing and accessories, choose a cap or crown, and pick a different color for each garment. Your Mayor stands on a floating cloud near headquarters.
Try a new look before you subscribe.
The shiny gold Customize controls in World lead to Aurora Retreat, Golden Haven and Garden Escape. Preview all three for free. Pro applies the customization choices you have earned through cardio.
Explore Pro looksSomething useful beyond the world.
Read 16 source-linked guides across movement, sleep, nutrition and stress, with a rotating daily Pro read. Everyone can try three free samples. Your Mayor’s heart lessons and quizzes remain free.
See the wellness library
See Cardia World in action
Your movement. A world of progress.
Take a walk, choose your style, and build a world worth sharing. Explore six building styles and see what consistent cardio can create.
Watch two 25-second previewsWatch the demo and get started
Automatic Apple Health workout sync
Let your workouts build for you.
Connect Apple Health on a compatible iPhone and allow workout access. Supported cardio workouts saved in Apple Health, such as walking, running, and cycling, can automatically contribute minutes and build points to your 3D world.
Record a workout with Apple Watch or a compatible app that saves workouts to Apple Health, then open Cardia World to refresh your progress. Apple Health is optional, and manual logging is always available.
Learn how workout sync worksApple Watch, daily activity, friends & co-op missions
One workout at a time
Watch your world become extraordinary.
Your consistency is visible. Each milestone adds homes, residents, landmarks, nature, and new places to name.
Choose your architecture
Six styles. A world that feels like you.
Start free with Cozy Heritage, Modern Grove or Future Bloom. Pro adds Neo City, Solar Garden and Zen Valley. Each style brings its own buildings, headquarters, landscapes and story.
01
Cozy Heritage
Terracotta rooftops, flower-lined paths, glowing village squares, and timeless community charm.
02
Modern Grove
Warm wood, open glass, green roofs, solar energy, and modern spaces designed around nature.
03
Future Bloom
Organic forms, luminous pathways, living rooftops, waterfalls, and an optimistic eco-future.
More than minutes on a screen
A world with a story. A habit with a rhythm.
Plan your week, keep a journal of your progress, and discover new reasons to return. These features are in the current App Store app.
Your world journal
Save real views of your world, revisit your latest 36 moments, and share a captured image when you choose. Find your journal in Progress.
A routine that includes rest
Choose your weekly cardio days and reminders. Planned rest days are protected, so your routine can fit a real week.
Monthly Pro collections
Preview animated keepsakes for free. With Pro, earn pieces through qualifying cardio days and display three favorites. Earned pieces stay yours.
Places with your name on them
Start earning naming rewards from cardio day three. Grow a distinctive headquarters, name your places, and let friends explore the details.
Friends, gifts and shared goals
Visit friends, message them, and send earned keepsakes. Pro members can host Co-op Cardio Missions; invited free friends can join.
Letters from a living world
Follow a 24-chapter mystery for your style, choose your replies, and hear from your mayor as your world needs care or begins to recover.
Available now in the App Store
Your world’s next chapter.
Available in Cardia World 1.1.29: more ways to capture your progress, build with friends and make your world feel like yours.
A journal that moves
Create a short rotating world video with your saved cardio-minute total. Creating your first video earns a Showcase Pavilion; sharing is your choice.
One link. A Friendship Garden.
Invite a new friend with a link. After they accept and complete three qualifying cardio days, you both earn a Friendship Garden.
More life, more ways to create
Choose small buildings, meet residents and join an optional community build. Add a Home Screen widget, turn on optional private journal backup, or arrange your terrace in Pro Design Studio.
Your daily loop
Simple movement. Meaningful progress.
Choose your goal
Choose a daily cardio goal that fits your routine—then walk, run, ride, or move in the way that works for you.
Sync or log your cardio
Import supported cardio workouts saved in Apple Health automatically, or log a session manually. At least 15 recorded cardio minutes in a day qualifies for construction.
Reveal what you built
Watch construction unfold, welcome new residents, and name each neighborhood, town, state, and country.
Cardio motivation, made visible
Find your reason to keep moving.
Is Cardia World a cardio app or a game?
Both. Cardia World is a fitness motivation app and world-building game. Your daily cardio helps a 3D world grow, giving you visible progress to come back to.
Can walking help build my world?
Yes. Walking, running, cycling, and other cardio can contribute to your progress. Record a qualifying cardio session manually or sync supported activity with Apple Health on a compatible iPhone.
Does Cardia World work with Apple Health?
Yes. With your permission on a compatible iPhone, supported cardio workouts saved in Apple Health can sync automatically and contribute build points. Open Cardia World after your workout to refresh your progress. Steps support world vitality; they are not converted into cardio build points. Manual cardio logging is always available.
Is Cardia World free to download?
Yes. Core world building and Friends are free on iPhone and iPad. Optional Cardia World Pro subscriptions add premium styles, customization, monthly collections, Cardio Battles and Co-op Cardio Mission hosting. Invited friends can join a mission for free.
Find your way to move
Explore Cardia World.
Get the details on cardio, walking, and the world you can build.
Cardio motivation
Give your cardio a world to build.
See how goals, recorded minutes, and world progress fit together.
Explore the cardio app Walking motivationMake your next walk count.
Learn how to log walking, use Apple Health, and understand steps versus cardio minutes.
Explore walking motivation Watch & get startedSee how Cardia World works.
Watch the preview, learn the daily loop, and find your first steps in the app.
Watch the app demo Build a routineHow to stay consistent with cardio.
Make a practical plan, prepare for busy days, and give your progress somewhere to grow.
Read the cardio habit guide
Private by design
Your progress belongs to you.
Cardia World requires an account to save and restore your world. Activity and world progress are stored on your device and in a private account backup; friends see only the game details you choose to share. There are no ads or cross-app tracking.
Read the privacy policy
Created by a physiology professor
A healthier habit. A healthier future.
Cardia World was created by a physiology professor with a simple mission: help more people build consistent cardio habits that support cardiovascular health and a longer, healthier life.
By turning everyday movement into a world you can see and grow, we aim to make staying active feel more rewarding, approachable, and worth coming back to.
Partnerships & opportunities
Let’s build what comes next.
Interested in partnering with Cardia World or collaborating as a creator? We’d love to hear from you.
Please include your name, company or channel, and a brief overview of the opportunity.
Your next workout could build something beautiful.
Download Cardia World for free on iPhone and iPad. Optional Cardia World Pro adds premium styles, customization, monthly collections, Cardio Battles and Co-op Cardio Mission hosting.
Download on the App Store