I was in Rome for a shopping trip and took a taxi from the shopping center to the airport to catch my plane home, we new the route was short and should only have cost about $5 but the taxi guy drove us clear around the city to ramp up the price. I didn't want make a fuss while in the cab in case we got stranded by the driver, final fare was close to €50.
I confronted him at the end of the journey and asked him if he thought I was a stupid and explained that I knew exactly how much it should cost, he made the excuse that there were road works that meant he couldn't take the normal route. I gave him €5 and told him where to stick it.
This is just one of many bad experienced I have had with metered taxi cabs both aboard and in London, any app or tool that gives me more choice, better control and helps me avoid being con'ed is good and I am afraid the traditionalist taxi drivers who have what I see as an unfair monopoly should start to move with the times and think of their customers first instead of themselves, maybe then they wouldn't have to be so scared of loosing them..