Assume the phone first
For most sites, more than half of chat happens on a phone held one-handed, on a patchy connection, by someone doing something else. If your chat experience was designed on a desktop, it is probably fighting the very visitors who use it most. Mobile is not a smaller version of the desktop chat — it is the primary case.
Mind the thumb zone
On a phone, the launcher and the composer live in the same corner your thumb already occupies — and the same corner where "back to top" buttons, cookie banners, and sticky bars pile up. A launcher that overlaps a checkout button or hides behind a banner is a launcher nobody taps. Test on a real device, at real sizes, with your actual page furniture in place.
Short messages win on small screens
A paragraph that reads fine on a laptop becomes an intimidating wall on a 5-inch screen. On mobile, agents should send shorter turns, break steps into separate messages, and lean on the visitor being able to scroll a conversation rather than a monologue. Canned responses written for desktop often need a tighter mobile variant.
Typing is expensive — reduce it
- Trim the pre-chat form. Every field is harder to complete with thumbs. Ask for the minimum, or none, and collect email inside the conversation.
- Offer quick replies where they fit. A tap beats typing for common branches.
- Respect autofill and keyboards. Use the right input types so the phone helps instead of fighting.
Design for interruption
Mobile conversations get interrupted — a call comes in, the app backgrounds, the signal drops. The experience must survive that: the conversation should still be there when they come back, and a message they missed should be waiting, not lost. Persistence across a dropped connection is the difference between "picked up where we left off" and "started over, annoyed."
Speed matters more on mobile
A mobile visitor's patience is shorter and their attention more contested. Fast first responses, an AI layer that answers immediately, and a widget that loads without janking the page all matter more here than on desktop. MyLiveChat's widget is built to be responsive on mobile out of the box — but the content choices above are what make it actually work under a thumb.