i am looking readymade android app

I am Looking 100 % Crash Free Readymade android app in Katlin so Experianced Android Developer Can Bid On My project requirement and other one thing i am looking to hire developer for long term .. First Priority Only For Surat

Reference App :

https://play.google.com/store/apps/details?id=com.threestar.gallery&hl=en

https://play.google.com/store/apps/details?id=com.mine.videoplayer&hl=en

https://play.google.com/store/apps/details?id=musicplayer.musicapps.music.mp3player&hl=en