Handcent SMS offers limitless potential for customization of the UI's appearance, notification options, and conversation styles. The contact list's font (including font color), and background color is fully customizable, with the ability to define whether contact pictures are included by the contact's name. Contact picture size can also be user-defined. Handcent also imparts many options to the user for SMS notification. One of the more superlative features allows a notification box to pop up on the phone as soon as an SMS is received. The box contains a text box for quick replies without having to launch the full Handcent program interface. Finally, Handcent enables the user to define the theme used for conversations. Options include: iPhone, Hero, and Android. For instance, the iPhone theme uses conversation bubbles for the sender and receiver. Font type, font size, font color, and background color can also be changed. Furthermore, all of these options can be defined for only a single contact, or applied to all conversations in the contacts list. Handcent SMS is the fastest and most customizable alternative to the stock messaging app.