Here are some of the most reliable transportation apps in Indonesia:

Grab: A popular ride-hailing app that offers a range of services, including taxis, motorbikes, and car rentals.

Go-Van: A ride-hailing app that offers a range of services, including taxis, motorbikes, and car rentals.

Go-Ride: A motorbike ride-hailing app that is part of the Go-Van network.

Go-Car: A car ride-hailing app that is part of the Go-Van network.

Angkasa: A ride-hailing app that specializes in motorbike transportation.

Maxim: A ride-hailing app that offers a range of services, including taxis, motorbikes, and car rentals.

Traveloka: A travel booking app that also offers ride-hailing services.

These apps are widely available and reliable, but it's always a good idea to check reviews and ratings before using a new service. Additionally, be sure to use reputable apps and follow safety guidelines when using ride-hailing services.