Mobile checkout abandonment often traces to input ergonomics, not price. We place primary actions in thumb reach and keep keyboards context-appropriate per field type.
Apple Pay and Google Pay are not optional for US consumer flows — guest checkout with wallets routinely outperforms account creation gates.
Error messages must suggest fixes inline: “Card declined — try another method” beats a generic failure banner.
Progress indicators reduce anxiety on multi-step flows — show step count and allow backward navigation without losing cart state.
Post-purchase confirmation is part of checkout UX: clear order summary and support contact reduce chargebacks and support tickets.
