Dough was created by the same team that created thinkorswim. Dough is designed to be a user-friendly engagement tool for novice investors, while thinkorswim is a more advanced platform that may be overwhelming for some users. While Dough is a good option for trading on an iPad, it still needs to be connected to a TD Ameritrade account in order to access your funds. Ultimately, the choice between Dough and thinkorswim will depend on the individual's needs and preferences when it comes to stock trading apps.