Weekly Digest
Jan 26 - Feb 1, 2026
13 articles that week
Java to Kotlin Conversion Comes to Visual Studio Code
Alina Dolgikh from JetBrains just made Kotlin migration way easier for VS Code users. No more manual file-by-file rewrites.
The Biggest React Native Apps in Production (2026)
Discord shares 98% of code across platforms with three iOS engineers. Shopify cut 1.8M lines of dead code. Here is every major app shipping React Native right now.
What's New in Swift: January 2026 Edition
Nick Sloan from Studioworks processed millions in invoices with Swift on the server and saw fewer production bugs than in 20 years of web development. Here's what's happening in the Swift ecosystem this month.
Behind the Scenes of React Native Multithreading: Vision Camera V5 and React Native Worklets
Tomasz J. Żelawski from Software Mansion reveals how React Native finally solved its biggest performance bottleneck. The secret? A multithreading engine that was hiding in plain sight.
Introducing AI SDK Profiler for React Native Performance Analysis
Callstack just dropped a game-changer for React Native teams struggling with AI SDK performance. If you've ever wondered why your on-device LLM integration feels sluggish, this new profiler is about to give you answers.
Cursor at Grab: Adoption and impact
Grab achieved 98% monthly active adoption of Cursor across their engineering org in just months. That's nearly 30 points higher than industry benchmarks for high-performing teams.
Building High Performance Sports Apps with Flutter
Kody Peterson from Foresight Sports reveals how his team rebuilt their mobile architecture with Flutter to handle interactive 3D visualization and real-time sports performance data. The technical decisions behind apps where milliseconds and accuracy directly impact athletic outcomes.
How Automated Prompt Optimization Unlocks Quality Gains for ML Kit's GenAI Prompt API
Google just solved one of mobile AI's biggest challenges: how do you customize foundation models for your app without breaking device constraints? Their answer might surprise you—it's not fine-tuning.
The solo dev playbook: ship faster with Expo, EAS Build, and OTA Updates
Liam Du built and shipped Wellspoken—an AI-powered articulation coach—to both iOS and Android in one week. Zero Xcode. Zero Android Studio. Just Expo.
Implementing CSS Clipping Techniques in React Native
CSS clipping techniques are coming to React Native, and they're about to change how we think about UI masking and visual effects. Callstack just dropped a deep dive into making web-style clipping work natively.
Optimizing GRDB in Todoist for iOS
The Todoist iOS team migrated from Realm to GRDB and immediately got flooded with complaints about sluggish performance. Their debugging journey uncovered a SQL trap that's probably lurking in your app too.
Beyond the smartphone: How JioHotstar optimized its UX for foldables and tablets
Prateek Batra from Google reveals how JioHotstar transformed their streaming app for 400 million users. The secret? Treating tablets and foldables as first-class citizens, not just stretched phones.
Kotlin Intrinsics on Android
Rahul Ravikumar reveals how Android's tooling has been quietly carrying the weight of Kotlin's type safety. Every null check, every parameter validation adds overhead that pure Kotlin apps don't actually need.