For mobile app development, you can use various software tools depending on your project requirements and target platforms. Some popular options include:

- Android Studio: Ideal for developing Android apps, offering a rich set of development tools and resources.

- Xcode: Designed for building iOS apps, providing a comprehensive development environment for Apple platforms.

- Visual Studio: Suitable for cross-platform app development, supporting languages like C#, C++, and JavaScript.

- Flutter: Google's UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.

- React Native: A framework by Facebook for building native mobile apps using JavaScript and React.

- Ionic: An open-source framework for creating cross-platform mobile apps using web technologies like HTML, CSS, and JavaScript.

These are just a few examples, and the choice ultimately depends on factors such as your project's requirements, target audience, and the skill set of your development team.