The great thing about Grab is that you have a number of services at your disposal. GrabTaxi is the most common one and allows you to call a taxi at any time. GrabCar, on the other hand, allows you to hire a private vehicle for an Uber-like experience. GrabBike is similar, but you hop on a motorcycle instead, behind the driver. Lastly, GrabShare offers you one of the cheapest options, where you share a vehicle with other users.
Grab provides a number of solutions to the transport issue in South-East Asia, allowing you to call taxis, cars, and motorcycles conveniently from your Android device.