iOS · Köln · Düsseldorf · Summer 2026

Run for
your city.

1v1 running duels. Challenge someone. Most kilometres in 7 days wins. GPS-verified. No feed. No followers.

⚔️ Get Aretos — TestFlight Beta How it works
M
Marie K.
KÖLN
24.6
KM · 7 DAYS
VS
T
Tobias R.
DÜSSELDORF
18.2
KM · 7 DAYS
LIVE DUEL · 3 DAYS REMAINING
7
Days per duel
1v1
Head to head
GPS
Verified runs only
0
Followers. No feed.
How it works

Three moves.
One winner.

01
Pick your city

Choose Köln or Düsseldorf. Your city is your team. Every run you log feeds the rivalry.

02
Challenge a rival

Send a 7-day duel to anyone in the app. Or scan their QR code to challenge them face to face.

03
Run. Winner takes it.

Most kilometres logged in 7 days wins. GPS-verified. No excuses. Rematch if you lose.

The corridor

Forty kilometres apart.
Forever rivals.

Run for your city. Travel to the rival city and earn a stamp on your Runner Pass.

Home
Köln

The Rhine's left bank. Dom-city runners who train through rain and claim the Saturday long run as sacred.

🏅 OPEN NOW
VS
Rival
Düsseldorf

The Rhine's right bank. Fashion-week pace, Altstadt ambition. They have been waiting for this since 1288.

🥇 OPEN NOW
What we refuse

Your runs are not content.

No social feed. No follower count. No coach. No step counter. No leaderboard of strangers. Just you, your city, and the person you challenged.

No social feed
No followers
No public profiles
No ads
No step counting
No coaching
Available now · TestFlight beta

Someone is
already running.

Get Aretos and challenge them.

⚔️ Join the beta — free

iOS only · Köln and Düsseldorf · More cities coming