It's not only tracking. It's convenience of ordering, and paying, and knowing in advance how much it's going to cost, etc. Sure, I've seen taxi apps doing that

It's not only tracking. It's convenience of ordering, and paying, and knowing in advance how much it's going to cost, etc. Sure, I've seen taxi apps doing that too but it always been hit or miss whether particular app works in particular city and has a good sized fleet there.