KetoyVM is a Kotlin execution runtime for Android that runs Ketoy Bytecode compiled from plain Kotlin source, including Jetpack Compose, coroutines, ViewModels, and Navigation, delivered as a .ktx bundle. Hilt and Room stay in the host app; KetoyVM exposes their functions for new features because updating them requires a Play Store release.

How do I ship Android app updates in seconds?

Write Kotlin, run ./gradlew ketoyBundle, upload the resulting .ktx to Ketoy Cloud, and the KetoyRuntime on every device fetches and executes the new bundle in about 60 seconds without Play Store review or binary split.

Is KetoyVM a server-driven UI framework?

KetoyVM is stronger than a server-driven UI DSL: it executes real Kotlin on device with native Jetpack Compose rendering, real coroutine semantics and real ViewModel lifecycles, so you keep full-surface Compose without a custom schema.

Is this like CodePush or Hermes?

What Hermes is to React Native's JavaScript, KetoyVM is to Kotlin and Compose: a purpose-built execution runtime, not a script interpreter wedged into a different stack.

Three weeks with Monzo Labs on the alpha.

Monzo Labs shipped a KetoyVM bundle to 2% of production for three weeks. Here is what we learned, together, about what alpha means.

The flow was a new checkout screen. The bundle was 184 KB. It ran for 21 days, received four updates, and reverted once. No crashes attributable to the runtime. One performance regression we fixed in v0.2.

WHAT WORKED

The loop from commit to production in under ten minutes. The team pushed four iterations during the field period, each one going live without a store release.

— Dev Relations, Apr 04 2026

Dev Relations

Writes about what happens when alpha partners meet production traffic.