Yes, you can opt out any time before you book a ride if you have previously activated RideShield. You can also do so in the following way.
On your mobile device:
When do I qualify for the S$5 late pickup voucher?
You qualify if your pick-up is delayed for more than 10 minutes after your driver’s initial ETA. After you complete the eligible ride that was delayed, you’ll receive the voucher in your app.
I’ve opted in but a fee wasn’t charged. Am I still covered?
If this happens, it means that your ride is not eligible for RideShield.