Durga is worshipped in different forms. She is a form of "Shakti". The evolution of Shri Maha Saraswati, Shri Maha Laxmi and Shri Mahakali took place from Shri Brahma, Shri Vishnu and Shri Mahesh respectively. Each of these 3 deities gave rise to 3 more forms and hence in all, these 9 forms together are known as Nav-Durga.
The antivirus report shows that this application is totally safe for usage. The app is designed by Lakshya and its category is Entertainment. Over 5K users downloaded and installed Nav Durga Wallpapers and the most recent update was on Oct 17, 2015.