It takes a lot of technology to create the illusion of simplicity.

Mobile first outpaced desktop as the primary source of web traffic worldwide in 2016, and today, mobile devices account for more than 60% of it. Traditional industries like retail and banking are seeing some of the highest growth rates. (Who wouldn’t choose the simplicity of depositing a check or browsing Prime Day deals from the couch?)

Mobile apps developed in these industries also tend to be some of the most complex, because creating that illusion of simplicity for the user requires complex integrations with a number of core systems. Anyone in mobile app development will tell you frequent, fast releases are a must for maintaining that experience – and so is thorough end-to-end testing, for minimizing risk to the mission-critical core systems these apps rely on. Read on for five testing best practices that can help you balance these competing pressures.