Developing an on demand delivery app involves several steps, including:

1. Define the scope and requirements of the app:

This includes identifying the target audience, the types of products or services that will be delivered, and any specific features or functionality that the on demand app should have.

2. Design the user interface:

This involves creating wireframes and mockups to determine how the delivery app will look and function.

3. Choose a development platform:

There are several options for building a delivery app, including native app development using platforms like iOS and Android or using a cross-platform development tool like React Native.

4. Build the app:

Building an on demand delivery app involves coding the app using a programming language like Java or Swift and integrating any necessary APIs or third-party services.

5. Test the app:

Before launching the app, it is important to thoroughly test it to ensure that it is reliable and easy to use.

6. Launch the app:

Once the app is complete and has been tested, it can be published to app stores or made available for download on the web.

7. Market the app:

In order to attract users and drive adoption, it is important to promote the app through marketing campaigns, social media, and other channels.

8. Monitor and maintain the app:

After the app has been launched, it is important to continuously monitor its performance, address any issues that arise, and release updates and new features to keep users engaged.