# What changed in expo-constants

> 2 changes in expo-constants 58 from its official release notes, upgrade guides and advisories. Each one cited. Sources checked 2026-10-18. HTML: https://unstale.sh/npm/expo-constants/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## expo-constants 58

### Behavior and default changes

- iOS builds load app config and .env files in development mode for configurations containing Debug, and production mode otherwise. (58.0.9) — [release notes](https://github.com/expo/expo/releases/tag/expo-constants%4058.0.9)
- Android builds load app config and .env files in development mode for debug and debugOptimized build types, and production mode otherwise. (58.0.9) — [release notes](https://github.com/expo/expo/releases/tag/expo-constants%4058.0.9)