Where can you find updates on grab promotions (like supersized promo)? Also, can we add Grab mastercard to Applepay wallet? Or how do we paywave using Grabcard? Thanks!

For iPhone, I think you can try adding the Grab virtual card to google pay and paywave from there!

Grab promos can be found on the Home page, and you can just scroll down from there, otherwise you can head to Account Challenges

Enabling notifications from grab should do the trick for the most part. You can join some tele channels too for updates.

Grabpay card is not supported on Apple yet.

You can paywave by tapping the physical card.