Meh, not that effective.

Downloaded the app while waiting to clear customs in BCN, and included a discount for airport service at same time. Helped me arrange a taxi to my hotel, which was slightly more convenient than waiting in taxi line. Was told by Hailo the discount did not apply since I did not pre book; lame. Then was unable to use app to hail a single ride while in Barcelona. Definitely need more drivers on the service to make it useful. When Über gets to Barcelona I am guessing Hailo will be dominated.

Reviewer#13 about Hailo - The Taxi App, v4.41.1