Enforcing a concrete performance budget for Expo EAS builds and OTA updates
The situation Say you are a mobile engineer on a small React‑Native team that uses Expo Application Services (EAS) for CI‑driven builds and over‑the…
Testing & QA
⚑ Report a ProblemLatest Testing & QA news from Tech News
All topics
agents
ai
api
architecture
automation
backend
beginners
career
claude
cybersecurity
devchallenge
devops
discuss
javascript
llm
machinelearning
mcp
node
opensource
performance
productivity
programming
python
security
showdev
softwareengineering
testing
tutorial
typescript
webdev
Deep‑link crashes in Expo Router when the app hits real traffic
The situation You are a mobile lead on a React Native product that just shipped version 2.4 with Expo Router 2.1.0. The release added a “share‑to‑ap…
Migrating a React Native app to the new EAS build and OTA workflow without a release freeze
The situation You are the lead mobile engineer on a React Native app that ships to 150 000 active iOS and Android users. The app currently uses the…
Expo SDK 58 beta opens with iOS 27 support and a faster build pipeline
You update your simulators, iOS 27 drops, and every app you haven't rebuilt yet either misbehaves or just looks wrong on the new scene-based life cy…
From bug report to verified pull request: how an agent fixes bugs using EAS Simulator
A user files a bug report that says "Settings crashes when I scroll to the bottom." No stack trace, no reproduction steps, no screen recording. You'…
Shipping my first mobile app: what an operations leader learned taking PromptSpend to iPhone and Android
I spent 15 years running operations and P&Ls, not writing apps. In August I set out to put PromptSpend, my open-source LLM cost calculator, on i…
Claude Code on a React Native Codebase: Guardrails That Actually Change the Output
Every React Native developer has run the same experiment by now: point an AI agent at the codebase, ask for a feature, watch it produce something th…
How SWSH turned 300 monthly builds into a release pipeline nobody has to babysit
"Expo's ecosystem helped us take human error and effort out of the release process, from a local build to a validated release." — Nathan Ahn, CTO, S…
Why your App Tracking Transparency prompt doesn't show up (and how it got my app rejected)
App Review rejected my iOS app under Guideline 2.1. The note said reviewers were unable to locate the App Tracking Transparency permission request w…
Build vs Buy: What Founders Get Wrong About Templates
Every week a founder DMs me the same question: "Should I build my React Native app from scratch or buy a template?" Here's the framework I use to an…
How much to share in a monorepo when building common features for web and mobile
This article is an English translation of the original Japanese article. When I added an Expo app to an existing Next.js web service, I initially wa…
Life After CodePush: Choosing an OTA Update Strategy for React Native in 2026
Microsoft retired the hosted Visual Studio App Center service on March 31, 2025. That included the managed service many React Native teams knew thro…
React Native i18n in 2026: A Practical Expo Router Playbook
If your React Native app only speaks English, you're leaving ~75% of smartphone users on the table. Here's the modern stack for shipping a multiling…
Shipping an Expo app to the App Store: the landmines nobody warns you about
I recently shipped Add to Calendar: AI Events — an iOS app that turns screenshots and text into calendar events — built with Expo SDK 52 and React N…
I joined Expo.
Originally published on expo.dev/blog by Seth Webster. I recently joined Expo as Chief Developer Evangelist while I continue to serve as Executive D…
Wiring Designers Into Your EAS Preview Loop
TL;DR Figma reviews miss everything that's a function of the real device — touch targets, scroll momentum, keyboard behavior, font substitution, dar…
5 proven strategies to increase adoption of your B2B mobile app
Originally published on expo.dev/blog by Dan Kelly. B2B mobile apps face a different challenge than consumer apps. You're not competing for attentio…
Six Lines, Zero API Calls: Running LLMs On-Device in React Native
Every AI feature I've worked on has done the same quiet thing: collect the user's text, send it to someone else's server, pay per token, and pray th…
Kotlin Compiler Plugin Cuts Android Startup Time by 30% in Expo SDK 56
Expo SDK 56 ships with a custom Kotlin compiler plugin that eliminates reflection from Expo Modules on Android. The result: 70% faster module initia…
Expo's MCP Server is Now Free - Connect Your AI Assistant to Expo Projects
The Expo MCP Server dropped its paywall. Anyone with an Expo account can now hook up their AI coding assistant to Expo docs and tools. Previously, y…
Building LifeFast: A Solo Founder's Deep Dive into Fasting App Architecture
There's a specific kind of frustration that comes from using a health app that feels like it was built by engineers who've never actually used it. T…
Expo SDK 56
Originally published on expo.dev/changelog By Alan Hughes, Brent Vatne Today we're announcing the release of Expo SDK 56. SDK 56 includes React Nati…
How to keep your OTA updates lean and fast
Originally published on expo.dev/blog by Jacob Clausen. Have you ever shipped a critical fix to your entire user base within minutes of merging the…
Как я сделал трёхуровневый кэш сообщений в мессенджере на React Native — и что узнал по дороге
Я делаю мессенджер ONEMIX на React Native. К моменту, когда я начал писать этот пост, в нём уже больше десятка экранов, групповые WebRTC-звонки чере…
I built my own IAP backend instead of using RevenueCat — what 3 weeks of pain taught me
I'm shipping a subscription-based React Native app and went through the "do I use RevenueCat or roll my own?" question that probably every solo RN d…