To update your email address on Groww, follow these steps:
Open your profile by clicking your profile picture icon at the top right of your home screen.
Select 'Account Details'.
Go to 'Personal Details'.
Click 'Edit' next to your current email ID.
Enter your new email ID.
Click 'Send OTP to new email'.
Enter the OTP received on your new email and complete the e-sign process.
Note: Groww charges Rs 118 (including GST) for changing your email ID through the app. If you're unable to log in, contact customer support for an alternative process via Digio.