Oxford-RiverBooks Thai InApp is a comprehensive English-Thai dictionary app by English Channel Inc. It offers over 230,000 useful words and phrases for those interested in or using the English language across various fields. The app caters to both new users requiring an InApp purchase and previous owners of the "Oxford Riverbooks Thai Dictionary" who can access the app for free.

This dictionary app features full-text content, detailed appendices with explanations, dual English-Thai and Thai-English search capabilities, real-time progress tracking, synonym searches, and spelling practice. It supports retina display, multitasking, customizable bookmarks, automatic history storage, offline functionality, and AI-powered word generation. Compatibility extends to iPhone, iPod, iPad, and macOS.