Live
Daily Race Commentator
Writes a short, energetic take on yesterday's final standings every day. It shows up as a card in your race lobby.
Out now · iOS + Android
Walk, Race,
Build Your City.
The next-gen fitness game where every step becomes energy, you race your friends, and you build your own metropolis.
New · AI Race Commentator- Free to start
- 30 languages
- iOS + Android
Artificial intelligence
An AI commentator that narrates your race.
Every day, Pacecraft's Race Commentator reads yesterday's results and calls your race like a match: who took the lead, who sped up, how big the gap is. In your language, with real numbers only.
Built with Claude Race Commentator Sample
Office October Race · Day 5 report
Mark holds the top spot, Dana closes in
Mark topped the day yesterday with 14,820 steps and stretched his lead to 6,240 steps. Dana has picked up the pace every day for three days; at this tempo the podium is within reach.
- 1 Mark 61,430
- 2 Dana 55,190
- 3 Emma 48,770
Next report tomorrow 13:00
Live
In-Depth AI Analysis
An analysis screen one tap away: the verdict of the day, standout moments and a fun fact from the race.
Live
Final Report
When the race ends, the commentator writes the closing story: the champion, the podium and the moments to remember.
Coming soon
Personal AI Walking Coach
Looks at your step history to suggest daily goals, streak saves and rest days that fit you.
Coming soon
Instant Chat Translation
Messages in race and team chats are translated automatically across 30 languages, so everyone in a global league understands each other.
Coming soon
Smart Quests
Weekly quests learn your pace: never too easy, never impossible, just right for you.
Built with Claude
Our AI is built with Claude.
We have used Anthropic's Claude models in Pacecraft's AI features. Our next AI features, such as the personal coach, chat translation and smart quests, are being built on Claude too.
No made-up numbers. No names.
The commentator only talks about the real numbers in the app and never invents new ones. The AI model receives labels like P1 and P2 instead of your name; real names are added to the text after the response comes back.
A three-layer experience
Your steps, your races, your world — in one app.
Walk, Generate Energy
Every 1,000 steps become 24⚡ energy. Walking is now the fuel that builds your city — even with your phone in your pocket.
Race Your Friends
Global leagues, friend races and private group tournaments. Rewards are computed by the system when a race ends; the only way to win is to walk.
Build Your City
Parks, sports complexes, stadiums… Spend your energy to level up buildings, grow population and happiness, and collect prestige each season.
7-Layer Anti-Cheat
Device attestation, source whitelisting and anomaly detection — no fake steps, just fair races.
Seasons & Quests
Weekly quests, milestones and season rewards keep you coming back for one more walk.
30 Languages, Worldwide
The interface ships in 30 languages. Istanbul or Tokyo — your league rivals are on the same lap as you.
24⚡
energy per 1,000 steps
30
languages supported
7
anti-cheat protection layers
100%
free to download and play
How it works
Start in three steps.
- 1
Connect your health data
Apple Health, Health Connect or Samsung Health — your steps sync automatically and securely.
- 2
Join a race
Enter the global league, invite your friends, or create your own private race.
- 3
Invest steps in your city
Spend the energy you earn to raise buildings, grow your city and win the season.
Straight from the app
Real screens, real game.
-
Pulse — your daily step ring -
Create a race in seconds -
Your city — alive and growing -
Build mode — spend your energy -
Connect your health service in one tap -
Leagues, friend and group races
Frequently Asked Questions
Good to know.
Which health services does it work with?
Apple Health, Health Connect (the new standard replacing Google Fit) and Samsung Health. Fitbit, Garmin, Xiaomi and Polar devices connect automatically through those services.
Is my data safe?
Your health data is processed as step counts only; there is no location tracking. All traffic is encrypted, and you can permanently delete your data from inside the app at any time.
How does the AI use my data?
The Race Commentator only reads step totals and standings within the race. The model receives labels like P1 and P2 instead of names, and the commentator never goes beyond the numbers it is given. Commentary is written for private and friends races, in the languages the participants use.
Can people cheat?
No. A 7-layer anti-cheat system (device attestation, source whitelisting, anomaly detection) filters fake steps so races stay fair for everyone.
Is it free?
Downloading and playing Pacecraft is completely free. A future Pro subscription will only add cosmetics and advanced analytics — step advantages are never for sale.
Does it drain my battery?
No. Pacecraft reads steps from your phone's built-in sensor pipeline; it doesn't run GPS in the background, so battery impact is negligible.
Which devices are supported?
iPhones on iOS 15+ and Android 8+ phones. The app is live on both stores — download it from the App Store or Google Play.
Your first 1,000 steps are waiting.
Download today, win your first race this week, build your city this season.
Free — no credit card required.