The Apostles' Creed is prayed in the Rosary. It is the first prayer in the Rosary.
Apostles Creed
Faithful Catholics pray their rosary every day, and the Apostles Creed begins the rosary so it could not possibly be more relevant - it is part of their daily prayer.
The Apostle's Creed
The Rosary begins with the the sign of the Cross, The Aposle's Creed is prayed, holding the crucifix. for more information on how to pray the Rosary see Link
The same Creed that you use year round. Thus it would be the Nicene Creed at Mass, and the Apostles Creed when you are praying the rosary.
What happens when you pray the Apostles' Creed is entirely up to you, it is not something magical that does something just because you pray it. If you pray it with right intentions and attention, then you are stating your belief in a whole summary of the Apostolic faith handed down to the Catholic Church from the Apostles.
There exist also the Apostles' Creed and the Athanasian Creed, but the Eastern Orthodox Church only uses the Nicene Creed during its services. In the Catholic Church the Nicene Creed is primarily used during Mass. However, the Apostles' Creed is sometimes substituted, especially for a children's Mass. The Apostles' Creed is used most frequently in daily prayers, such as the rosary. The Athanasian Creed is extremely long and almost never used except as an historical reference.
Apostles creed
The Apostles Creed Protestant Version
Easy pray the Rosary and tell God you are offering it up to someone else.
Apostles Creed - album - was created in 2006.
The first part of the rosary is reciting the creed.