Useless
The only thing it does is tell you to download a different app.
take this off the App Store
As soon as you download the app it tells you that it is no longer supported and that you have to download one of their other apps

Navigate Kuala Lumpur's rail and subway system with a beautifully designed, easy-to-use map. Quickly plan routes, find stations, and view line information. Optimized for all Apple devices.
5.5
August 18, 2017
This app has been updated by Apple to display the Apple Watch app icon. - minor improvements
MoreNo, Kuala Lumpur Rail Map Lite is ad-free, providing an uninterrupted user experience.
Kuala Lumpur Rail Map Lite is a universal app optimized for iPhone, iPod Touch, and iPad.
The app was last updated on August 18, 2017, with version 5.5. Future updates will depend on developer activity.
Kuala Lumpur Rail Map Lite has an age rating of 4+, making it suitable for a wide range of users.
Yes, Kuala Lumpur Rail Map Lite features GPS support to help you find the station closest to your current location.
While not explicitly stated as offline, the app's core function as a map and route planner suggests it can be used without a constant internet connection once downloaded.
Kuala Lumpur Rail Map Lite has an average rating of 3.6 stars based on 14 user ratings.
Yes, Kuala Lumpur Rail Map Lite includes a station lookup feature that allows you to search for a station by name.