Uber versus Grab

Uber has come to Vietnam - about 1 year ago! Difference is that Uber in Vietnam are motorbikes not cars. Grab is Uber's only competitor and are also motorbikes.
Uber and Grab are only found in major cities. The taxi companies hate them because their cost is 80% less than cabs! Also, like US Uber, you have to call them and they tell you what the cost is before they pick you up (normally in less than 10 after you call them) - but, unlike Uber, you pay the driver.
Top pic is Linh paying my Uber driver after I took it to a restaurant where we met for lunch.