The basics of app development involve understanding the fundamental concepts and technologies that are used to design and build mobile apps. These include:

1. Programming languages: To build an app, you will need to learn a programming language. The most popular languages for mobile app development are Swift (for iOS) and Kotlin/Java (for Android). Both languages are object-oriented and have a large developer community, making them a good place to start.
2. SDKs and frameworks: Software Development Kits (SDKs) and frameworks provide a set of tools and libraries that make it easier to develop apps. For example, the Android SDK provides a set of tools for building Android apps, and frameworks like React Native and Xamarin allow developers to build apps for multiple platforms using a single codebase.
3. User Interface (UI) and User Experience (UX) Design: The UI is the visual aspect of an app, and the UX is the overall experience of using an app. Both are important for creating apps that are visually appealing and easy to use. To create a good UI, you should learn about design principles, such as typography, color theory, and layout. To create a good UX, you should learn about user research, usability testing, and user flow.
4. Database management: Most apps need to store data, such as user information or app settings. To store data, you will need to learn about databases and how to interact with them from your app. Popular databases for mobile apps include SQLite and Realm.
5. API integration: Many apps need to interact with external services, such as social media platforms or weather services. To do this, you will need to learn about Application Programming Interfaces (APIs) and how to make API calls from your app.
6. Version control: As you develop an app, you will likely make many changes to the code. Version control systems like Git allow you to keep track of these changes and collaborate with other developers.
7. Testing and debugging: To ensure that your app is working correctly, you will need to test it and fix any bugs that you find. You should learn about different types of testing, such as unit testing and functional testing, as well as how to use debugging tools.
8. App deployment: Once you have built an app, you will need to deploy it to the app stores (such as the Apple App Store or Google Play Store) so that users can download and use it. You should learn about the submission process and the guidelines for each app store.
9. App Maintenance: Once your app is published, it’s important to maintain and update it regularly. This includes fixing any bugs, adding new features, and ensuring that the app continues to work with the latest operating system updates.

In summary, the basics of app development involve learning a programming language, understanding SDKs and frameworks, designing a user-friendly UI and UX, managing databases, integrating APIs, using version control, testing and debugging, deploying the app, and maintaining the app after publication.

It’s also important to note that app development is a constantly changing field, new technologies and frameworks appear frequently, and it’s important to stay informed and up to date with the latest trends and developments. Additionally, app development is a team effort, and it’s important to learn how to collaborate and communicate with other developers, designers, and stakeholders.

As you gain more experience, you may also want to specialize in a specific area of app development, such as game development, virtual reality, or wearable technology. Additionally, developing mobile apps is not the only way to enter the app development field, you can also develop web apps, progressive web apps, desktop apps.