It's secure to download the app. DroiDev has created Hanoi Metro that lies within the Maps & Navigation category. Over 100 users downloaded the tool and the most recent update was released on Mar 23, 2015.
The overall rating for this application is 3.5 on Google Play. Download the setup package of Hanoi Metro 1.0 for free and have a look at users' reviews on Droid Informer. The app can be launched on Android devices 2.2 and higher.