Multi-channel app development means creating a program that works on many different kinds of screens or devices, such as a phone, tablet, or computer.
Think about how you might play with building blocks. You might start building a tower on a flat surface, but then decide to move to a bumpy rug or a wobbly table. To keep the building blocks stable and safe from falling, you might use different kinds of blocks that work better on each surface.
The same thing goes for building apps. If you only make an app that works on one type of device, it might not work well on others. That's where multi-channel development comes in.
The app developers create the program in a way that it can be used on different types of devices or screens. They do this by designing the app to adjust its size and layout according to the kind of device it's being used on. This means that the app has to be flexible, like a gymnast, able to bend and stretch to fit different screens.
To make this all work, app developers have to use special tools and techniques to make sure the app works well on different devices. They might also have to consider things like screen resolution, memory usage, and battery life, and they have to test the app on different devices to make sure everything works smoothly.
So, multi-channel app development is like building a tower with blocks that work on any surface, and app developers use special tools to make sure the app works well on any device you might want to use it on.