Skinny Jump is an application for you to manage you Skinny Jump account. With this application, you can easily top up, check your balance, and renew your account. However, if you are an existing Skinny Jump account holder, you can skip the lengthy process and go straight ahead and sign up to set up the application. With this, you can easily renew your plan without any hassle. Most importantly, this application is totally free for you to download.