6-sinf Qadimgi dunyo tarixi. K is an Android app developed by Akmaljon Abdullayev that provides a crossword puzzle related to history. This app is designed for history enthusiasts who want to test their knowledge and learn new information about the past. The app is free to download and use, and it falls under the Education & Reference category.

The app is suitable for students in the 6th grade and above, as well as anyone interested in history. The crossword puzzle is challenging but not too difficult, making it a great way to spend leisure time while also learning something new. The app is user-friendly and easy to navigate, and it does not require an internet connection to use.