Most online shopping in South Africa happens on a phone, which means a store or listing designed and tested on a desktop screen is being judged by most customers on a screen it was never actually checked against. Small details that are barely noticeable on a computer, such as small buttons or slow-loading images, are the difference between a sale and an abandoned cart on mobile.
Design and test for the device your customers actually use.
Test on an actual phone, not a resized browser window
Buttons large enough to tap accurately, text readable without zooming, and a checkout that works with a thumb rather than a mouse. Resizing a desktop browser window does not reveal these problems the way an actual phone does.
Check the whole path from finding the product to completing payment on a real device before assuming it works, since small friction points compound across each step.
Keep pages light for the data customers actually have
Heavy images and large page sizes cost customers money on limited data plans, and slow loading loses sales before a customer even sees the product. This is a commercial decision, not only a technical one.
Compress images, avoid unnecessary scripts, and test loading time on a throttled connection rather than assuming a fast office connection reflects your customer’s experience.
Payment and messaging need to work on mobile specifically
Mobile payment options that customers already use, rather than only card entry, remove friction at the final step where most abandonment happens.
A business messaging profile with a catalogue and saved replies handles enquiries and orders directly from the platform customers are already using, without requiring them to switch to a desktop site at all.
Consumer obligations apply regardless of device
Accurate descriptions, reasonable quality and cancellation rights on electronic transactions apply whether the sale happened on a phone or a desktop, and a confusing mobile checkout does not reduce those obligations.
Customer information collected through a mobile store carries the same duties under the Information Regulator as any other channel.
Frequently asked questions
Do most South Africans shop online on a phone?
Yes, which means a store tested only on a desktop browser is being judged by most customers on a device it was never checked against.
What should I test on an actual phone?
Button size, text readability, and whether checkout works comfortably with a thumb, from finding the product to completing payment.
Why does page weight matter so much?
Heavy images and large pages cost customers money on limited data and lose sales to slow loading before they even see the product.
What payment options should a mobile store offer?
Mobile payment methods customers already use, not only card entry, since friction at checkout is where most abandonment happens.
Do consumer protections change on mobile?
No. Accurate description, reasonable quality and cancellation rights apply regardless of the device used to buy.
Originally published in April 2018. Updated September 2026 to explain why mobile-first design matters for online selling in South Africa.
