Do I Need an Account to Upload?
No. Guests don't need a Chivent account, don't need to sign up, and don't need to download an app.
Just scan the QR code or tap the link — the event page opens in your browser and you can upload immediately.
If the host has enabled guest registration, you may be asked to enter your name before uploading. That's not an account — it's just so the host knows who uploaded what.