We're here to help
Support
Need a hand with the BIOSI (Kaste) driver app? Our team supports drivers and the licensed waste-management companies they work for across the Kingdom of Saudi Arabia. Reach us by email or WhatsApp and we'll help you get moving again.
Support hours
Sunday to Thursday, 8:00 AM – 6:00 PM (AST, GMT+3).
We typically reply within one business day.
Common questions
I can't sign in to the driver app.
Your account is provisioned by your employer — the waste-management company you work for. If your email or password isn't working, ask your supervisor to confirm your account is active, then email support@kaste.sa if the problem continues.
The QR handover keeps failing.
Ask the facility representative to rescan the code and read you the number shown on their screen. After several wrong entries the app pauses verification for a short cooldown; if your account becomes blocked, call the number on the app's blocked screen or contact us here.
How do I access or delete my data?
Driver accounts and their operational records are owned by your employer. To request access, correction, or deletion of your data, email support@kaste.sa and we'll route your request to the responsible company.