Good UI

GoodUI publishes the results of real A/B tests on interface patterns, from countdown timers and sticky add-to-cart buttons to button shape, gathered from contributors and leaked experiments at companies such as Etsy. More than 640 tests are organised by screen type, tag and metric, with numbered patterns that tie results together, and members see exact effects and sample sizes. It began as 75 intuition-led UI ideas and suits designers who want evidence before changing a checkout or signup flow.