Which solution you should choose depends on the type of content you want to create, budget, and internet access.
The web app has a big advantage in that it doesn't need to be downloaded, but it's available directly and it works whether your customers use iPhone or Android. For more technically demanding functions, an app is preferable, and the app can be used offline.
Now that we have explained the differences, pros, and cons of each solution, it may be clearer for you to choose the right solution for your business.
Remember that in the end, it's all about your business's needs and ambitions.