The official 6K practice space in cori. Your preparation for the arena.
Your children practice the 6K songs independently from home. With professional videos, interactive exercises and an app that children understand instantly. Free for all participants.
👧 100,000+ Children
🏟️ Arena Concerts
✓ Free
The 6K practice room, now as an app
Months before the big concert, your children learn a complete repertoire of 12 songs: pop, classical and folk. With cori, the 6K practice room goes mobile. Children can sing, dance and practice independently from home. Anytime, anywhere, with no extra work for teachers.
Learn more about 6K UNITED! →
Independent practice from home
With the official practice videos, children can sing and dance along to the songs on their own. Large buttons, clear structure, no clutter.
All 6K songs in one place
12 songs per concert year, professionally arranged for children's voices. Pop, classical, folk. With navigation markers straight to the right section.
From the practice room to the arena
Children see their progress, collect streaks and build excitement for the big concert. The anticipation for the stage starts here.
For Teachers and Choir Directors
Less organizing, more time for music
No More File Chaos
No more sharing YouTube links via WhatsApp. Everything is in the app, always up to date and always accessible.
Protected Environment
The 6K area is only accessible with an access code. GDPR-compliant, data in Germany.
Zero Setup for You
Children download the app, enter the code and start right away. No setup, no accounts, no cost.
Ready in 3 Steps
Download the App
cori is free on the App Store and Google Play.
Enter the 6K Code
Simply enter the access code from your choir director.
Practice & Sing Along
Sing along, listen anywhere, and even get feedback!
There's more to come
From May 2026, the 6K area in cori is getting even bigger. Here's what's planned:
- Your own classrooms and choir groups as a teacher
- Learning challenges the whole class can join
- Assign children to their choir groups
Practical Answers
Download the cori app and enter the 6K access code you received from your choir director or teacher. You'll go directly into the closed 6K area.
Yes, completely. The 6K area in cori is free for all participating children. No subscription, no credit card, no hidden costs.
cori runs on iPhones and iPads (iOS 16+) and Android devices (Android 8+). The app is free on the App Store and Google Play.
cori is GDPR-compliant and hosts all data on servers in Germany. The 6K area is closed, with no public profiles and no social features. We prioritize data minimization and child-friendly defaults.
Official 6K YouTube videos with navigation markers (Left/Right/Warm-up), the child-friendly interface and personal practice streaks.
Teacher codes for classrooms, schedule management, learning challenges and assigning children to choir groups.
Yes. Once loaded, content is available without internet. Ideal for schools and community centers with poor WiFi.
6K UNITED! is Germany's largest children's choir project. Every year, over 100,000 children learn a shared concert repertoire and perform it in large arena concerts. Find out more at 6k-united.de.
Email us at info@getcori.app. We typically respond within one business day.
What else cori can do for your choir
Beyond 6K, cori is the perfect practice space for your choir. So you deliver at every concert.
Upload your own songs
Upload your own pieces or record them directly in cori. Not just for 6K, but for any repertoire.
Interactive exercises for every voice
cori generates individual exercises from every song for soprano, alto, tenor and bass. So every child practices exactly their part.
Rehearsal and event planning
Organize rehearsals, performances and events directly in the app. Your whole choir stays in the loop.