Two temples in the United Arab Emirates. Jumeirah Mosque has 1 ticket or tour to book; Sheikh Zayed Grand Mosque has 18 tickets and tours to book. The table and the two notes below put them side by side; the full pages have what to see, the ticket and the timing for each.
Jumeirah Mosque is one of the few mosques in Dubai that non-Muslims can visit, and it can only be entered on a guided tour run by the Sheikh Mohammed Centre for Cultural Understanding. The standard tour lasts about an hour and a quarter, takes place in the morning on most days except Friday, and costs a small fee paid at the mosque or booked in advance. It includes a short welcome with Arabic coffee, dates and pastries, a walk through the prayer hall and an open question-and-answer session in which the guide explains Islamic practice, prayer and local customs.
Entry to the mosque itself costs nothing. Visitors register for a free time slot through the mosque centre's official website, and the staff run short complimentary cultural tours in English and Arabic from the visitor centre several times a day. If you are staying in Abu Dhabi and can get yourself there by taxi, that is all you need, and it is the sensible choice for most people.
What the paid market sells is mainly transport and context. The most common product is a half-day or full-day trip from Dubai, about 140 km away, which collects you from your hotel, drives you down the coast road and gives you an hour or so at the mosque before moving on to other sights in the capital, such as the Qasr Al Watan presidential palace, the Corniche or the Louvre Abu Dhabi.