The Oxford Dictionary & Thesaurus app by MobiSystems represents a comprehensive digital adaptation of Oxford University Press's renowned language references. This application consolidates 15 major Oxford dictionaries into a single mobile platform, providing users with authoritative definitions, etymologies, and translations across multiple languages including English, French, German, and Spanish. The app leverages Oxford Languages' scholarly resources, maintaining the academic rigor associated with the publisher's print editions while adding digital functionality. Core functionality includes advanced search capabilities with wildcard and anagram features, audio pronunciations by native speakers, and offline access to all dictionary content. The app incorporates both the Oxford Dictionary of English and New Oxford American Dictionary, providing comprehensive coverage of British and American English variants. Additional features include word-of-the-day notifications, favorites management, and historical look-up tracking. The thesaurus integration offers synonym exploration with nuanced differentiation between similar terms, while language learners benefit from verb conjugation tables and grammatical notes. The interface employs a clean, utilitarian design with intuitive navigation between dictionaries and reference sections. Search results display phonetic transcriptions, part-of-speech labels, and usage examples drawn from Oxford's corpus of contemporary language. Real-world usage patterns show particular utility for academic writing, cross-language translation work, and vocabulary building. The app's offline functionality makes it valuable for travelers or users in areas with limited connectivity, though some advanced features require internet access. User feedback consistently praises the app's accuracy and comprehensive coverage. Angela Kelly (August 23, 2025) noted appreciation for 'the inclusion of both British based definitions as well as American based' distinctions, particularly valuing cultural and geographical word variations. Hazel Sharon (September 2, 2025) reported the app 'gives definition and examples of words without any mistake and is really helping with school work.' Alexander Gray (August 26, 2025) offered constructive feedback regarding the search interface, noting users 'need to click the found word after typing it into the app.' The application demonstrates significant strengths in content authority and feature depth, though the premium subscription model for full access may limit value for casual users. The interface, while functional, shows occasional usability constraints in search execution. Ideal use cases include academic research, professional writing, language learning, and translation work where lexical precision and multiple language resources provide tangible benefits over simpler dictionary applications.