Jai Gayatri Maa!
Gayatri mata is known as Vedamata, the mother of all Vedas.
She is an aspect of Mata Saraswati, Mata Lakshmi and Mata Parvati, all three in one form.
The Gayatri mantra is seen as a divine awakening of the mind and soul, and within it a way to reach the most supreme form of existence, and the way to union with Brahman.
Understanding, and purely loving the essence of the Gayatri Mantra is seen by many to be one, if not the most powerful way to attain God. A person totally devoted to Gayatri recitation can achieve great success in the path of self advancement and achieve material and spirtual benefits.

This is the Pro version of the app Jai Gayatri Maa. The most complete reference guide to Maa Gayatri in the Play store containing:

Gayatri Mantra
Gayatri Chalisa
Gayatri Aarti
Gayatri Hand Mudra (Including Slideshow option)
Gayatri 108 names ( Rudra Yamalam and Devi Bhagavatam)
Gayatri Mantra Variations (such as Navgraha, Lord Hanuman, Maa Lakshmi and so on).

All in Original Hindi (Sanskrit) and English text.

For the free version please download Jai Gayatri Maa Lite.