Release
Undra 1.2: no drift between three hosts
One core made three hosts agree on logic. 1.2 adds a diff of one flow recorded per platform, a custom port that compiles on iOS, and a faster gate.
Blog
Notes from the Undra team
Comparisons, architecture and the reasoning behind Undra's design. RSS feed
Field notes
A week of outside use: seven findings, five fixes
A team tried Undra for a week and sent seven findings. Five are fixed, each with a decision record and a review; two were not taken on, and why.
Performance
Fifteen levers: the JavaScript runtime at 16 KB
How what a hello-world page loads up front of @undra/runtime went from 22,100 to 15,774 bytes gzipped without removing a feature.
Launch
Undra 1.0: one Rust core under native apps
What Undra is, who it is for, what is in 1.0, how to try it in five minutes, and what it is not.
Overview
Why Undra is the default choice
A sourced matrix of what KMP, UniFFI, Flutter and React Native stop you doing, what Undra solved and how, what it costs to adopt, and what is still open.
Architecture
Reads never cross the boundary: how Undra's state model works
How Undra mirrors Rust state into SwiftUI, Compose and React: change-sets, keyed lists as recorded operations, a schema-hash gate, and what it all costs.
Comparison
Undra vs Kotlin Multiplatform: sharing logic without leaving your platform
Undra and Kotlin Multiplatform both share logic and keep the UI native. A dated, sourced comparison: iOS, web, reads, tooling, ecosystem and team fit.
Comparison
Undra vs UniFFI and Crux: three ways to put Rust under a native app
Three ways to put a Rust core under SwiftUI, Compose and React: UniFFI bindings, Crux's Elm-style core, and Undra's mirrored state. Dated and sourced.
Thesis
Why Undra keeps your UI native
Shared UI and shared logic are different bets. What Flutter, React Native and Compose Multiplatform trade, who should pick which, and where Undra stops.