Dash Core v1.0 (scheduled for testnet end of december 2019) will be supported on current mobile wallet apps of Android and iOS.
The Dash Evolution wallet app DashPay that was originally announced as a separate wallet app, will instead be supported directly on existing mobile native wallets.

Link : https://www.dash.org/forum/threads/dashpay-will-be-built-into-the-existing-native-mobile-wallets-on-android-and-ios.48201/  

This is a technical change from javascript based mobile wallet support to native based mobile wallet support. The reason for this is because native mobile wallets
showed sufficient native library support for Dash Core v1.0 and demonstrated they can handle it.