If you're looking to learn about the Jamaican Creole language, I'd definitely recommend turning to YouTube–it can be a great resource for sparking your language-learning journey. With YouTube, you can also search for specific phrases and concepts that may interest you in particular.
Apps that do English to Jamaican Patois translation are useful tools as well; however, they don't replace listening to a native voice. Also, you are exposed indirectly – not only to just words - but also expressions or idioms which will eventually help users gain familiarity and grasp on the subtlety of communication such as irony, puns or sarcasm, etc.