A free app for Android, by GCenter.

With the My Bonsai app, you can make a virtual bonsai tree that can be customized according to your liking. Much like a true Bonsai, you can use this app to construct a realistic model of the tree as it develops. Even a preexisting tree can be used as a starting point. With this easy-to-use tool, you can easily create sophisticated, elegant trees. We offer a variety of photo applications that let you select and edit parts of the tree to match your ideas. So, if you are looking for an app where you can grow a bonsai without physically having one, then this app is for you.