Why do most dropshipping stores fail?

Because the cost of finding a customer rises and the margin cannot absorb it. The store is profitable at one advertising price and underwater at another, and nothing on the storefront changed.

Why the answer is what it is

The second cause is delivery time. Somebody who waits three weeks does not buy again and often does not stay quiet about it, so the acquisition cost has to be paid twice to reach the same person.

What this looks like in practice

A dropshipper who survives past the first year almost always stops dropshipping — they start holding stock for their best sellers, because that is where the margin is.

Returns are where the model is tested. If your supplier will not take a return, you are the returns department.

Dropshipping’s hard part was never finding a product — it is that you do not control delivery, and delivery is what a customer remembers.

Where a mobile app comes into it

An app is worth building once people buy from you a second time. Most dropshipping stores never reach that point, which is why the honest answer here is usually ‘not yet’.