MRT Jakarta Apps Concept

I recently using the brand new MRT in Jakarta. As a first timer, I try their MRT App to know how much I must pay, when the train arrived or how long the heading time but not find it, but, I believed they already think about that for the apps but not yet implemented. With my humble opinion here my concept for Jakarta MRT Apps.
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Music by
kyungsoㅅㅇ - [CLEAN INSTRUMENTAL] Weki Meki (위키미키) - "Picky Picky"
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Sound effect by
Melvin Deswira - PIDS & Announcer MRT Jakarta : Lebak Bulus - Blok M (Right Side)