Petal is perfect for first-time users, but not necessarily the best card for rebuilding credit.  We have found that for applicants that have a credit score, those applicants that have a fair credit score or greater are more successful in applying for Petal.
For more information about credit scores and how to build credit, check out more info here from the CFPB:

If you would like to apply, you can do so at www.petalcard.com
How do I get and keep a good credit score?