Depends completely on the number of rounds. Each round should be done in 10 minutes or less.
Here the scheduled Live tourneys are 7 rounds, with at least 14 players, so assuming no one withdraws, each player will get 7 games.
Time is variable but close to 70 minutes is the max, though some rounds will finish more quickly. Probaly not any quicker than 50 minutes.
In which system are the tournaments held? I apologize for my weak English. The translation is carried out using the Google Translate service and with my small corrections.
You will need to use a browser. The iOS app does not have that feature yet.
What is (approximately) the duration of a tournament for 20 people with the regulation of 5/0 blitz? And how many games each player will play?