Request application development in studio
This is the simplest way if you don't have time to develop code, create a design, merge one with another, and so on down the list. A good studio will help you choose the necessary functions for the needs of your business. For clarity, you can use the application calculator to find out what you need to add to your own.
But this way has its drawbacks, such as cost and speed of execution. Of course, this will be faster than making everything from scratch yourself, but there are also faster ways.
No code

Freelance services

Go through the courses and develop the application yourself

Use open resources

Templates (Flutter templates, react-native templates)






Conclusion
Now you have a clear illustration of the quality of the done work, how much you will spend your time and money. It's up to you, choose the most practical and convenient way for you.