In the store

The list is built for shopping: big targets, usable one-handed and with gloves.

Ticking

• Tap anywhere on a row (at least 56 pixels tall) to tick an item.
• The row stays put briefly: ticks are sent and the list reorders 800 milliseconds after the last tick. Tap again to undo a waiting tick immediately. Leaving the list sends waiting ticks.
• Ticked items don't disappear; they move to the collapsed "In the trolley" section at the end. An accidental tick is undone with one tap.

Shopping at the same time

Two people in different aisles see each other's ticks within a second or two — nothing to reload.

Finishing the trip

When you're done, tap Finish shopping at the bottom.

• Everything ticked is completed and stored in the history.
• Whatever is not ticked stays on the list.
• The items you bought become tiles for next time.

The button is only active once at least one item is ticked.

When the last item is ticked or the trip is finished, the phone shows a small burst of confetti and gives a light vibration, once per trip and without a sound (see Wusel and colours).

Offline

The list works without signal too: adding, ticking, changing the count and Finish shopping carry on as usual. Anything the server has not received yet carries a small cloud icon, and the top of the list says, for example, "2 changes waiting to be sent". As soon as there is a connection again, WuselWall sends everything by itself, in the right order.

On an iPhone this only happens while the app is open: if you closed it in the shop without signal, it sends the next time you open it. Creating a list and changing the default list need a connection.