Kotlin - Android Tutorial by Third World Technologies is a free educational and reference app designed for novice programmers who want to learn Kotlin programming language. The app provides an in-depth Kotlin Basic Tutorial and Java vs Kotlin Comparison, making it a great starting point for beginners.

Additionally, the app offers sample Android programs in Kotlin, offline feature, and video tutorials. The app also includes Kotlin Interview Questions, which will help learners prepare for job interviews. The upcoming version will include a quiz feature, which will allow learners to test their knowledge.

Overall, Kotlin - Android Tutorial is a comprehensive guide that offers a variety of features to help learners master Kotlin programming language and develop Android applications with ease. The app is compatible with Android 9.0 and is highly recommended for anyone looking to learn Kotlin programming language.