If you plan to connect your phone to an external stereo, recorder or mixer then you’ll need an aux cable. These are male-to-male connectors. They can be TRS-to-TRS, TRRS-to-TRRS or TRS-to-TRRS. You have to also consider whether your phone case is too thick for most of these cables. Many times Life Proof cases prevent your cord from making a connection. Here are two options:
Hopefully one of those will suit your needs. You can check out my Gear page for other media-creating tools.