Hi everyone ! Thank you for all your support and DM, that give me a lot of motivation. And sorry, my english still bad 
I updated Kooban - Project Management with a brand new UI and optimization. You can see updated UI here 
• White and Dark Mode with Switch in setttings
• New french native version (separated app)
• You can add a project to your favorites
• You can now revoke an user from your shared projects
• More clear interface with translucent appbar
The Android version is now waiting for release, I will update this post with the link
Screenshots :
International version :
Kooban - Project Management on the App Store (apple.com)
French version :
Connecting to Apple Music.
A big thanks to everyone ! If someone know how I can create a promo code, I will be happy to give you a big discount on my app !