Based on the information provided, the best free credit card appears to be the Chase Freedom Unlimited card. This card has no annual fee and offers unlimited 1.5% cash back on all purchases. Additionally, it has a welcome offer of $350 in bonus points after spending $3,000 on purchases in the first three months, and up to $3,000 more in bonus points by earning 2 bonus points per dollar spent in the first six months. The card also has a 0% intro APR for 15 months on purchases and balance transfers, followed by a variable APR of 20.49% - 29.24%.