With the Payconiq by Bancontact app, you can do much more than just only paying. The app includes a lot of extra features and services that do not exist in the old Payconiq app. You will still be able to refund friends through the contact list, send a payment request or pay in-store through a QR code. But you will also be able to add your loyalty cards in the app, split the bill between friends and easily buy tickets for the NMBS/SNCB and De Lijn through the app. All you have to do is transfer your existing account from the Payconiq app to the Payconiq by Bancontact app.
Discover more about it here.