An e-commerce app, or mobile commerce app, is a software program that allows users to buy and sell items online. E-commerce apps can be used to:

Browse and purchase products
Add items to a cart
Create a wish list
Process payments
Track shipments
Manage orders
Receive sales notifications
Get personalized content

E-commerce apps can be beneficial for both businesses and customers. Businesses can use them to engage with customers in a dedicated space, while customers can personalize their experience.