#Cresc - Professional Over-the-Air Update Solution

Cresc (npm package: react-native-update ) is a professional Over-the-Air (OTA) update service for React Native teams shipping globally. It is designed to keep release workflows lean, stable, and cost-efficient from small apps to large production fleets.

#🚀 Why Choose Cresc?

#Ultimate Update Experience

• 🎯 Ultra-small update packages: Incremental updates based on bsdiff/hdiff limits size to tens to hundreds of KB, saving 99%+ bandwidth compared to full-size updates — with an exclusive Hermes-bytecode optimization on top (see benchmark below).
• ⚡️ Lightning Fast Distribution: Global CDN delivery and incremental patch transport keep updates fast and reliable with a 99.9%+ success rate.
• 🛡️ Secure and Reliable: Built-in crash rollback mechanism automatically reverts failing patches, guaranteeing stability.
• 🌐 Full Platform Support: Flawless support for iOS and Android.
• 🔍 Deep React Native Integration:
  • ✅ Expo - Seamless integration
  • ✅ New Architecture - Immediate support
  • ✅ Hermes - Full bytecode translation
• 📖 Open Source Ecosystem: The client SDK, CLI tools, and admin UI are fully open source on GitHub. Transparent and auditable logic means you can host your own servers without vendor lock-in.
• 📊 Full Release Visibility: The dashboard ships with built-in analytics, percentage-based staged rollouts, and release health monitoring — see every release's adoption and stability at a glance, no extra data pipeline needed.
• 🔒 Data Security: Intercept and handle data analytics yourself. You retain full control.
• 💬 Professional Support: Dedicated technical support to troubleshoot issues and keep your app stable.
• 🏆 Proven Track Record: Running reliably since 2016, powering numerous well-known apps and enterprises.

#📊 Benchmarked: a diff algorithm purpose-built for Hermes

Hermes bytecode is full of offset tables — a one-line JS change shifts every offset after it, which makes generic binary diffs blow up in size. Cresc applies an exclusive HBC (Hermes bytecode) structure-aware reversible transform that removes this amplification at the source.

Measured on a real React Native 0.86 app (~4.4 MB bytecode; the benchmark code and data are fully open and reproducible):

• 95%+ bandwidth saved vs full updates, and another ~30% saved vs classic bsdiff incremental updates
• The smaller the change, the bigger the win — exactly the high-frequency hotfix scenario OTA is for
• Fail-safe by design: the bytecode structure is fully validated before transforming, with automatic fallback to the plain incremental path; new Hermes versions are supported with zero client-side changes

#💰 Unbeatable Value

Compared to other alternatives, Cresc is more powerful yet highly affordable:

With Cresc, your team gains:

• ✅ 90%+ reduction in CDN bandwidth costs
• ✅ 10x faster iteration speeds (bypass app store review times)
• ✅ Minute-level emergency bug fixes
• ✅ 99%+ user update adoption rates
• ✅ Flexibility in development cycles

#Simple to Use

// Integrate in 3 lines of code
import { UpdateProvider, Cresc } from "react-native-update";

const crescClient = new Cresc({ appKey });

<UpdateProvider client={crescClient}>
  <App />
</UpdateProvider>

Built-in policies available out of the box:

• 🔕 Silent Updates - Background downloads, completely transparent to users
• 💬 Prompted Updates - Friendly system alerts for available patches
• ⚙️ Custom Strategies - Fully API-driven flow control

#🚦 Get Started

Recommended onboarding flow:

1. Install & Use Skills - Recommended AI-first integration path
2. Installation & Config - Prepare dependencies and native config
3. Code Integration - Review or fine-tune the generated wrapper code
4. Publish Updates - Ship new OTA versions from your CLI

Start using Cresc today, and bring a professional OTA update workflow to your React Native app!