App Info

Installed-binary identity, read synchronously

Installed-binary identity, exposed as One.AppInfo. Three fields, read synchronously from the native constants: version is the user-visible marketing version (CFBundleShortVersionString / versionName), build the binary build (CFBundleVersion / versionCode, stringified on both platforms so display and comparison code stays platform-blind), and applicationId the install identity (CFBundleIdentifier / applicationId).

import { One } from 'one'

One.AppInfo.version // '2.4.6' | null
One.AppInfo.build // '891' | null
One.AppInfo.applicationId // 'dev.app.id' | null

The values are a snapshot read once at import and frozen: the binary cannot change under a running process. null means unknown (a host that failed to stamp, or an old build without the native module), never guessed. On native the snapshot always describes the installed binary, never bundle-time values: after an over-the-air update the JavaScript bundle and the binary disagree, which is exactly when a build comparison must read the binary. On web there is no installed binary: version comes from the ONE_APP_VERSION build-time value, and build and applicationId are always null.

Prebuild stamps the binary values from native.app: version becomes MARKETING_VERSION / versionName, ios.buildNumber becomes CURRENT_PROJECT_VERSION, and android.versionCode becomes versionCode. Missing fields keep the template defaults (1.0 / 1), so a store build must set all three.