Is it permissible to make phone apps to sell Islamic information? For example, the iPhone mobile phone has a number of apps that are sold via the Apple company, such as the electronic Mushaf, Saheeh al-Bukhaari, Saheeh Muslim, and so on. I would like to make apps like these, that deal with the Qur’an and Prophet’s hadeeths, for the iPhone and iPad, and upload them to the App Store as unique apps.

I read your answer about prayer whilst doing surgery or afterwards. I work as a doctor and the day is very short in Canada during the winter; Maghrib comes at 5 p.m. Hence the time between the prayers is very short and I do not know how the surgeon can do his work when this time is very short. Hence I think it is better to make the prayers up afterwards. What is your opinion on that?

What are the Virtues of the Day of Arafaah?

What is the rate of Zakaat al-Fitr? Is it permissible to give it after the Eid Prayer? Is it permissible to give Zakaat al-Fitr in cash?

Is it valid to read Qur’aan from the computer instead of from the Mushaf ?
In other words, reading from websites on the Internet or from text files that contain the entire Qur’aan, which is displayed on the computer screen. I work in a company and during my breaks I read Qur’aan on the computer.
Is it necessary to have wudoo’ for this kind of reading, as is the case when reading from the Mushaf?.

I would like to know some of the ahaadith which speak of the virtues of Jumu'ah prayer.

When a person repents, he makes a vigorous start and says: "The Shaytaan is telling me to slow down", so he does more acts of worship. Then his enthusiasm cools down, and he says: "Allah does not burden any person beyond his scope", and his acts of worship become less until he goes back to the way he was. 

My question: What advice can you give? Should he make a vigorous start, or take a gradual approach until it is established and then add more after a while, or should he follow the saying: "When your wind blows, then make the most of it"?.

If one Muslim brother loves another Muslim brother, does he have to say to this brother "I love you for the sake of Allah?

I have a question about some terminology that I would like you to explain to me. In some audio lectures I hear words such as (a marfoo' hadith) or  (a maqtoo' hadith)..

What is the ruling on eating the food (rice, meat, chicken or cake) that is given to us by a Christian friend that he made for his birthday or for Christmas or the Christian New Year? What is your opinion on congratulating him by saying, "Insha Allaah you will continue to do well this year" so as to avoid saying Kull 'aam wa antum bi khayr (approx. "season's greetings") or "Happy New Year" etc?

A woman became Muslim and lives with her family who are not Muslims, and now they do not object to her being Muslim. She tried to call them to Islam by various means, but to no avail. How should she deal with them in their misguided state? Should she uphold ties with them or limit her relationship with them?.

What are the things that a Muslim woman may uncover in front of a kaafir woman, such as a Buddhist woman for example? Is it true that she is not allowed to uncover her face?