I’ve open-sourced the DDP client we’ve been running in production for the last two years in our Android + iOS app. Repo: GitHub - bordoio/kmp-ddpclient: Kotlin Multiplatform client for Meteor’s DDP protocol — websocket connection management, subscriptions with an in-memory minimongo mirror, and method calls as coroutine Flows. · GitHub Subscriptions feed a local minimongo mirror you observe as coroutine Flow s, so collections stay in sync the way they do on the client.