You can display the products in grid view by selecting the products from Magento Backend. You must select a minimum of 4 products to display in Product Grid. 
You can select the N-Number of products for the Product Grid. More buttons will be displayed to check more products from the Product Grid in-app. By clicking on the ‘Edit’ icon, a popup window will open named Edit Product Grid. 
Here, you can insert the details regarding Product Grid and select the images which you want to display on Product Grid in App. 
Component Title: Add a relevant title that will be displayed above the product grid block in the app.
Select Product Type: You will have two options to choose products to be displayed:
From a Category :
As you select From a Category, you must select the Category from the ‘Select Category’ dropdown and select products based on the selected category. 
By selecting this option, you will have a whole list of products and from that list, select the products which you want to display under the product grid in-app. 
By clicking on the Save button, product selection will be saved and displayed in the application.