As for the clarification of dhuha prayer this is:
Whoever dhuha dhuha 12 rakaat, Allah will make for him the palace of heaven "(H.R. Tirmiji and Abu Majah)

"Whoever performs dhuha prayers forever, will be forgiven of their sin by Allah, even though the sin is as much foam in the sea." (H.R Tirmidzi)

"From Ummu Hani that the Messenger of Allah (may peace be upon him) shalat dhuha 8 rakaat and shake each two rak'ahs." (HR Abu Daud)

"From Zaid bin Arqam, Said, "The Prophet came out to the people of Quba and they were praying dhuha '. He said, "Awwabin prayer (two ') ends up with stinging heat (noon)." (HR Ahmad Muslim and Tirmidzi)

"The Messenger of Allah said in the Hadith Qudsi, Allah SWT said," O son of Adam, do not ever lazy to do four rak'ah prayers dhuha, because with that prayer, I will need your needs in the afternoon. "(HR Hakim & Thabrani)

"Whoever remains silent in the mosque or the place of prayer after shubuh prayers for performing i'tikaf, dhikr, and performing two rak'ah prayers dhuha accompanied by nothing but goodness, then his sins will be forgiven even though the amount exceeds the foam in the ocean." HR Abu Daud)


 fiture:
-wipe offline / no internet connection
- small file size
-can be used in different versions of android