This document discusses frameworks for evaluating language learning mobile apps. It begins by outlining the growth of the market for language learning apps since 2007 and their potential benefits. It then reviews various taxonomies proposed for categorizing apps and examines several evaluation frameworks put forward by scholars. These frameworks consider factors such as curriculum alignment, feedback, differentiation, user friendliness, motivation, and evidence of learning. The document argues that the "perfect" evaluation framework does not exist and that criteria may vary depending on the specific app. It concludes that frameworks can help develop skills to critically examine apps and that using multiple apps can create synergy to suit different learner needs.