App.js Conf 2026
2026-05-27..2026-05-29
Kraków, Poland
[App.js Conf 2019, App.js Conf 2022, App.js Conf 2023, App.js Conf 2024, App.js Conf 2026]
as the organisers put it
The biggest React Native and Expo conference in the world. Three days of talks and workshops in Kraków on mobile agentic engineering and building React Native apps with AI.
| title | author | length |
|---|---|---|
| Thank you for coming to | 01m | |
Brief closing that offers thanks and a social follow request rather than technical content, pointing to App.js Conf and swmansion on X via the two provided… | ||
| Offline-First React Native: Designing for production | Karan Balodi | 20m |
Claims that modeling user actions as event-sourced replayable events plus optimistic response fixes crashes, reconnects, and partial multi-step flows; initial… | ||
| Emit Once, Notify Anywhere | Benjamin Schachter | 17m |
A typed domain event bus that starts from one emit and routes to a single emission point now drives 5 notification providers, 55 event types, and 4 compound… | ||
| Bringing Privacy-Preserving Cryptography to Mobile Apps | Ya-wen Jeng | 18m |
Mopro is a mobile-first ZK prover that generates on-device ZK proofs for iOS, Android and React Native bindings by cross-compiling existing Rust provers and… | ||
| Your E2E Tests Are Lying to You | Tyler Becks | 17m |
Gobi finds that conventional E2E suites generate three real bug finds versus roughly 56 maintenance failures, so the team replaces brittle Maestro/Appium flows… | ||
| Visual Editor for Reanimated | Catalin Miron | 30m |
A visual editor called Key Framer compiles live Reanimated + Gesture Handler code on web and mobile, with a browser canvas and QR mobile preview that actually… | ||
| It's great time to be a builder | Seth Webster | 16m |
Argues that AI plus modern tools like Expo + AI shrinks the gap from idea-to-app so a single engineer can go from concept to production in days instead of… | ||
| What is your app actually doing in production? | Kadi Kraman | 18m |
Expo's open-source Expo Observe library and the hosted EAS Observe collector capture OpenTelemetry-style startup and per-screen metrics (launch, bundle load… | ||
| Accessibillity in Motion | Britta Evans-Fenton | 22m |
Shows how to make React Native animations work with screen readers and Reduce Motion using Reanimated and React Native APIs. Explains iOS replace vs Android… | ||
| One Codebase, Three Platforms: Making Universal Expo Work in Production | Edwin Vargas | 18m |
One Expo codebase runs iOS, Android and web to power an AI construction product that surpasses $1M ARR, started by a single frontend engineer. Teams ship via… | ||
| React Native without Cocoapods | Riccardo Cipolleschi, Christian Falch | 19m |
Provides a working SPM-based path that replaces CocoaPods for React Native iOS, covering core packaging, Hermes, Codegen and autolinking and allowing… | ||
| The Reverse Magic Trick | Gant Laborde | 19m |
A live “reverse magic” demo wires a phone camera and human reviewers to AI image generation to recreate an audience volunteer holding a chosen card; the… | ||
| Expo on Desktop | Jamie Birch | 19m |
Expo desktop is an unofficial compatibility layer plus CLI that makes React Native macOS and Windows run on Expo, implementing create app and prebuild commands… | ||
| Liquid User Interfaces for the Next Generation of AI Apps | Rafael Mendiola | 28m |
Builds and ships a design system, a renderer, and a server-driven protocol that lets an AI compose interfaces from predefined components instead of hardcoded… | ||
| Screens & Routers — The Foundation of Navigation in React Native Apps | Kacper Kafara, Kuba Tkacz | 22m |
Explains how Expo Router’s file-based Expo Router pairs with native primitives from React Native Screens to implement native tabs (released September) that… | ||
| Challenges in Building React Native Applications with On-Device AI | Norbert Klockiewicz | 23m |
After 1.5 years building on-device features with react-native-executorch the work surfaces concrete constraints: Hugging Face hosts ~3 million models but sizes… | ||
| Illusion of Portals in React Native | Kiryl Ziusko | 25m |
Claims that common React Native portals are just JS registries (context or Zustand) that mutate the React tree and break context propagation, causing remount… | ||
| Shipping Partiful on Autopilot | Yefim Vedernikoff | 21m |
Partiful ships a new Expo release every week for nearly three years and hits its 150th release this year by running a Friday 6:00 a.m. cron that triggers a… | ||
| Write TypeGPU, Use Anywhere: Composable WebGPU Shaders for React Native and Beyond | Iwo Plaza | 31m |
TypeGPU compiles TypeScript into WGSL and claims shaders often run faster than hand-written WGSL by doing compile-time precomputation, dead-code elimination… | ||
| Re-architecting the ElevenAgents SDK for React Native | Kræn Hansen | 13m |
ElevenLabs replaces a single monolithic context with separate, memoized context providers one context per concern, which stops unrelated components (e.g., a… | ||
| Is AI making React Native obsolete? | Perttu Lähteenlahti | 16m |
Builds a SwiftUI app, implements a React Native port, then uses Claude agents to convert SwiftUI to Kotlin and measures 3× tokens, 8× prompts and nearly double… | ||
| How to Build the Fastest Apps: Break the Rules | Jay Meistrich | 20m |
Claim: rethinking state so consumers subscribe to stable state objects instead of lifting state up cuts work dramatically. Legend List and Legend State use… | ||
| Pixelicious | William Candillon | 29m |
Updates land on three projects: React Native WebGPU, Skia Graphite and Project Redraw. React Native WebGPU now mimics the web so context.present removed, adds… | ||
| Expo Keynote | Charlie Cheever | 14m |
Expo reports concrete wins and roadmap items: SDK 56 ships with precompiled binaries and Hermes V1 as default, Android cold starts improve ~40%, and Expo UI… | ||
| Software Mansion Keynote | Krzysztof Magiera | 19m |
Software Mansion reports concrete results: over 280 commits to React Native and 750 commits to Expo in the last year; Hermes becomes default in v84; Reanimated… | ||
| Live stream from Day 2 | Jamie Birch, Gant Laborde, Riccardo Cipolleschi, Christian Falch, Edwin Vargas, Britta Evans-Fenton, Kadi Kraman, Catalin Miron, Tyler Becks, Ya-wen Jeng, Benjamin Schachter, Karan Balodi, Seth Webster | 07h 40m |
Day two stitches together practical launches and demos: an unofficial Expo Desktop: create app + pre-build CLI that cuts macOS/Windows setup from an hour to… | ||
| Live stream from Day 1 | Krzysztof Magiera, Charlie Cheever, William Candillon, Jay Meistrich, Perttu Lähteenlahti, Kraen Hansen, Iwo Plaza, Yefim Vedernikoff, Kiryl Ziusko, Norbert Klockiewicz, Kacper Kafara, Kuba Tkacz, Rafael Mendiola | 07h 52m |
Yearly state-of-the-union for React Native lands hard: Hermes becomes default in RN 0.84, Reanimated 4 + worklets extracted ships with CSS‑style animations and… | ||
| nothing matches | ||