https://go.swadharmaa.com/app/V56a
This is an excellent app which every hindu must install.
Salient features:
Daily panchangam
Daily graha poaitions
Daily sandhyavandana kaalam as per your location
Excerpts from dharma sastram, neeti sastram bhagavad gita etc
Mantra bhagams from Veda in grantha
Library section which has lot of materials on homa vidhi, prayogas, when to do what,
Sakunam, nimittam etc
Presently it is in Tamil.
Created by Brahmasri Narayana Vajapayee Srirangam Trichy
He is son of Brahmasri Sengalipuram Sunadararama deekahitar, a living authority on dharma sastrams..
Namaskarams