Pay Mi

The amount is the state. On the keypad the balance sits at $0.00 in grey — a placeholder, not a value. Type a figure and it turns black. There is no button to hunt for that might be enabled or disabled: the number itself tells you whether you have a payment yet.

Sending is a swipe, not a tap. Money moving between people is not undoable, so committing takes a gesture you cannot make by brushing the screen. The instruction only appears once there is an amount to send — before that, the screen offers nothing to commit.

Success and failure are the same screen in two colours. Same layout, same amount in the same position, same weight. Only the colour, the mark, the verb and the way out differ — so the eye lands immediately on the thing that actually changed rather than re-reading a new page.

Success dismisses on any tap. Failure asks for a decision. A completed payment says “tap anywhere to close” and gets out of the way. A failed one offers “Try Again” and waits, because it still needs something from you.

The success mark is enclosed; the failure mark is bare. A check inside a ring reads as sealed and finished. An open cross reads as interrupted. The shapes carry the meaning before the words do.

Send and Request are one screen, not two. The recipient, the amount and the note are identical in both directions, so the only thing that changes is the verb — and it changes on a toggle rather than sending you somewhere else.