Call, then row
A double bass-drum call sets the beat. You row the phone — or tap — and the crowd answers.
1-Day Build · Grok 4.5 · Open Source
Viking Chant
Row like the fans.
A complete mobile app — product, code, audio, and release path — built in one day with Grok 4.5 and Grok Build. Drum call. You row. The crowd answers.
Not affiliated with any national team, football federation, or tournament. Fan-made interactive homage to a public chant style.
The app
Simple loop. Real product.
Built for people who want to feel the chant on a phone — and for builders who want to see a full stack shipped with a frontier coding model.
Crowd under your control
Pick size, pace, vocal color, and drum feel. The loop stays simple; the settings go deep enough to play with.
Works offline
Audio ships with the app. Once installed, you can chant without waiting on a network.
Priority story
1-Day Build with Grok 4.5
Frontier models are judged by what they can ship. Viking Chant is a public proof point: one day, one app, full path from idea to open source and store packaging — pair-programmed with Grok 4.5 in Grok Build.
The video walks the whole arc: product framing, Expo and React Native structure, TypeScript gameplay loop, motion rowing, audio banks, settings, monetization hooks, and the MIT repo you can clone today.
- Idea to shipping path in a day. One focused product: stadium call-and-response on a phone, with a real motion loop and production-minded structure.
- Grok 4.5 on the hard parts. Architecture, TypeScript app code, session logic, audio wiring, settings, and store-ready scaffolding — iterated with Grok 4.5 inside Grok Build.
- Open source + store track. MIT core on GitHub so anyone can read the build. iOS and Android store packaging under Flow Logic Automation LLC.
Grok 4.5Grok BuildExpo SDK 54React NativeTypeScriptEASGoogle AdMob
Video link coming soon — follow @vern_crawford and @verncrawford for the drop.
Get the app
Download now
Available now on the App Store and Google Play. Same experience on iOS and Android: row like the fans, offline after install.
Supported by standard Google AdMob banner ads. Optional one-time Remove Ads purchase for $2.99.
Read the code
Open source on GitHub
The MIT core is public so the world can evaluate the work — not a toy snippet, a real app structure produced with Grok 4.5. Clone it, star it, fork it, and judge the output for yourself.
FAQ
Common questions
What is Viking Chant?
A mobile app where the phone plays the bass-drum call and you row to trigger the crowd response. Tagline: row like the fans.
What is the 1-Day Build?
A full build story — product, code, audio, open source, and store path — completed in one day with Grok 4.5 and Grok Build. Watch it on YouTube and X when the links go live below.
Why open source the app?
So builders can inspect a real, complete project shipped with a frontier model. Clone the MIT repo, learn from the structure, and see what Grok 4.5 can produce end to end.
When can I download it?
Available now on the App Store and Google Play. Use the download badges on this page for the official listings.
How does the app make money?
Standard Google AdMob banner ads. Prefer no ads? A one-time Remove Ads purchase for $2.99 clears them.
Do I need an account?
No. Play on-device with local settings. Motion is used on the device for rowing; see the Privacy Policy for ads and purchase details.
Is this an official team or federation product?
Not affiliated with any national team, football federation, or tournament. Fan-made interactive homage to a public chant style.
Who built this?
Vern Crawford (x.com/verncrawford) with Grok 4.5 and Grok Build. Published by Flow Logic Automation LLC.
Support
Questions or feedback?
Fastest path: DM @verncrawford on X. You can also email support@vikingchant.com.