Call4English app for iPhone and iPad

Call4English is a phone application-based program for developing mastery in the domains of reading, speaking, and listening, with particular emphasis placed on encouraging students to speak more grammatically, fluently, and above all, confidently.
What makes it special?
Call4English is different because it provides students with a comprehensive, level-based program in conjunction with access to live professional instructors for each lesson. The convenience of using a phone app combined with real time contact with a teacher is our recipe for success.
C4E is an app based ESL teaching platform designed around a crime story movie. The movie is divided into 240 short clips which are 1-3 minutes long. Each lesson is based on one clip and includes comprehension questions, Grammar structures with exercises and answer keys, a transcript of the clip, and vocabulary lists. There are 4 levels made up of 6 chapters with ten lessons each.