A/B testing is a method of comparing two versions of an app screen, feature, design element, or user flow to determine which one performs better. Users are divided into groups that see different versions, and their behavior is measured using metrics such as conversion rate, engagement, clicks, or completed actions. In mobile app development, A/B testing helps teams make data-driven decisions instead of relying only on assumptions.
A/B testing helps businesses improve the user experience and app performance based on real user behavior. Testing different layouts, calls to action, onboarding flows, pricing screens, or other app elements can reveal which version leads to higher engagement or conversion rates. It also allows teams to validate changes before applying them to all users.
A mobile app has two versions of its subscription screen. Version A uses a “Start Free Trial” button, while Version B uses a “Try for Free” button. The app team runs an A/B test and compares how many users start a trial in each version. The better-performing option can then be used for all users.