Which browsers work
KUVRT needs Safari 18.4, Chrome 137, Firefox 131 or Samsung Internet 30, or later.
Edge, Brave, Opera and other browsers built on Chrome count as Chrome.
An older browser shows "Update your browser to use KUVRT". Update it in its store or its settings, then open KUVRT again.
KUVRT also stops working in a browser version that no longer gets security updates from its maker, a few weeks after the maker stops. Until then the chat list says by when to update. In such a browser your chats stay readable, and you can export them or link another device to move them there, but nothing else is sent or received.
iPhone and iPad
On iPhone and iPad, the system version counts in every browser. "Update your iPhone to use KUVRT" means it needs a newer iOS: KUVRT works on iOS 26 or newer.
- Open the Settings app, then General, then Software Update.
- Install the update, then open KUVRT again.
If your iPhone cannot update any further, use KUVRT on another phone or a computer.
Android
Update your browser in the Play Store, or use another browser from the list above.
Computer
Most browsers update themselves when you restart them. Look for an update in the browser's menu.
Still stuck?
Email contact@kaiserbyte.com and say which topic you read.