Nice to see the Standalone version of Haveno DEX mobile app is already on the roadmap.
Let's pump the community support to reach this task as soon as possible! 
GitHub
GitHub - KewbitXMR/haveno-app: The Multi-Platform Haveno App for Monero
The Multi-Platform Haveno App for Monero. Contribute to KewbitXMR/haveno-app development by creating an account on GitHub.