Misinformation on social media undermines informed decision-making and public trust. Prebunking offers a proactive complement by helping users recognize manipulation tactics before they encounter them in the wild. We present CritiSense, a mobile media-literacy app that builds these skills through short, interactive challenges with instant feedback. It is the first multilingual (supporting nine languages) and modular platform, designed for rapid updates across topics and domains. We report a usability study with 93 users: 83.9% expressed overall satisfaction and 90.1% rated the app as easy to use. Qualitative feedback indicates that CritiSense helps improve digital literacy skills. Overall, it provides a multilingual prebunking platform and a testbed for measuring the impact of microlearning on misinformation resilience. Over 6 months, we have reached 500+ active users. It is freely available to all users on the Apple App Store (https://apps.apple.com/us/app/critisense/id6749675792) and Google Play Store (https://play.google.com/store/apps/details?id=com.critisense&hl=en).

翻译：社交媒体上的虚假信息削弱了知情决策与公众信任。前置辟谣通过帮助用户在遭遇虚假信息前识别操纵手法，提供了一种主动应对方案。我们推出CritiSense——一款通过短时交互挑战与即时反馈培养此类技能的移动端媒介素养应用。它是首个多语言（支持九种语言）模块化平台，支持快速更新以适应不同主题与领域。我们报告了一项包含93名用户的可用性研究：83.9%用户表示整体满意，90.1%用户认为应用易于使用。定性反馈表明CritiSense有助于提升数字素养技能。总体而言，它提供了多语言前置辟谣平台及衡量微学习对虚假信息韧性影响的测试床。在过去6个月中，我们已覆盖500余名活跃用户。该应用在Apple App Store (https://apps.apple.com/us/app/critisense/id6749675792) 与Google Play Store (https://play.google.com/store/apps/details?id=com.critisense&hl=en) 上向所有用户免费提供。