Once you spend the required amount to get a stamp, click on the chop tab, request for the quick response (QR) code from the staff and scan the QR code with your phone's camera.
Accumulate the required number of stamps and claim your reward from the retail outlet. Once this is done, you get a fresh slate to accumulate more stamps.
A search function in the cards tab will help you to locate the nearest merchants registered with Perx.
This story was first published on Oct 17, 2012 on StraitsTimes.com. To read more: http://sph.straitstimes.com/supplements/digital-life/story/app-the-week-perx-20121017