[ Proof ]

Packages

Native packages carry a stub for their native side, written to match what the real module does. Each one is scored by how much of its API runs, and packages with visual proof are compared case by case against native iOS.

1,003packages tracked

29with visual proof

1,484visual cases

Will it run?

Drop a package.json or lockfile to check every dependency. The file stays in your browser.

Check your package.json

Verifiedpixel-diffed against a real native device

Worksloads and runs

Partialsome APIs missing

react-native

arbitrary app-specific NativeModules and complete core module methods, exact automatic scroll insets and nested-scroll edge behavior, advanced TextInput selection/autofill, uncommon platform lifecycle and accessibility events, complete UIManager/system/dev-tool semantics, LogBox and Systrace behavior, and native virtual-collection visibility modes

99%

[ Essentials ]

@react-native-masked-view/masked-view

upstream masked-view JS runs unchanged against an RNCMaskedView native view seam: its first subview is the alpha mask (canvaskit saveLayer + BlendMode.DstIn)

100%

react-native-safe-area-context

rotation-specific provider frame deltas remain unassessed

100%

@react-native-async-storage/async-storage

RNAsyncStorage native seam: promise-based scoped databases and legacy default storage sharing v2 data; legacy merge is a native no-op. iOS 3.1.1 runtime validated; no measured compatibility score for 3.x.

100%

@sentry/react-native

real event transport to DSN, native crash/session replay capture, breadcrumb persistence; intentionally absent for development simulator

100%

react-native-gesture-handler

tap, pan, pinch, rotation, fling, long press, race, manual, simultaneous, force touch unavailable-hardware parity

100%

react-native-get-random-values

real upstream package — not intercepted. native side via the RNGetRandomValues module (native-seams/react-native-get-random-values.ts), mirroring ios/RNGetRandomValues.mm

100%

react-native-reanimated

Reanimated 4 CSS layout, border metrics, shadows, filters, and complex-value transitions and keyframes remain incomplete

99%

react-native-screens

over-drag return spring fidelity, sheet-to-scroll handoff creep beyond the largest detent

99%

@react-native-community/netinfo

native network identifiers and metrics are unavailable; transport hints depend on browser support, and default Internet reachability mirrors navigator.onLine rather than probing a remote endpoint

99%

react-native-keyboard-controller

KeyboardBackgroundView and ClippingScrollView lack their native platform effects; OverKeyboardView native-window fidelity beyond the observed iOS browser cases remains unverified; KeyboardExtender does not include accessory height in keyboard-frame metrics and exact native geometry remains incomplete; toolbar focus eligibility excludes hidden or zero-size inputs that native iOS counts

98%

react-native-worklets

synchronous named-runtime results, runtime-id scheduling into named workers, custom queue/event-loop configuration, cross-runtime structured-clone hooks for custom registered classes, dynamic feature flag fan-out across the tenant↔shell split

96%

react-native-svg

native SVG filter components and toDataURL refuse calls; ForeignObject does not render; marker context paints remain unverified; TextPath advanced layout, per-glyph positioning and objectBoundingBox paints are unsupported; pattern non-scaling strokes use the tile matrix; no font or emoji fallback parity claim

95%

@react-native-community/datetimepicker

countdown mode renders the time wheel; exact time-input font spacing and native keyboard interaction are not certified; deprecated onChange is not covered by the retained native proof

94%

react-native-webview

Safari/WebKit cross-origin URI pages without COEP-compatible response headers remain permanently loading because WebKit ignores iframe credentialless; Chromium credentialless cross-origin URI frames send no credentials, including cookies set by their own origin, and use ephemeral storage; iframe pixels in canvas screenshots; script injection, ReactNativeWebView bootstrap, and onOpenWindow for remote pages outside a playwright-driven sim (the desktop app or a plain browser tab), because only the sim browser host reaches a cross-origin frame at document start; injection into a remote page whose Content-Security-Policy forbids eval, which a WKUserScript bypasses; source.headers on the initial load of a remote page; cross-origin history truthfulness (goBack/goForward across documents, truthful canGoBack/canGoForward) plus reload and history-traversal policy decisions; initial-load decisions for data:/about:/file documents, which stay ungated with no paired native ask observed; remote HTTP error statuses and refused remote connections, which a cross-origin frame never exposes to the browser, and the HTTP status of a non-get form submit; allowsBackForwardNavigationGestures, userAgent, dataDetectorTypes, cacheEnabled, incognito, scalesPageToFit, originWhitelist enforcement

81%

[ All Packages ]

969 / 989

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expo-linear-gradient

upstream expo-linear-gradient JS runs unchanged against an ExpoLinearGradient native view seam drawing the CGGradient its layer draws

100%

@iterable/expo-plugin

load-safe noop — expo plugin function returns empty config

100%

@mattermost/react-native-turbo-log

native-seam complete: the real logger writes and rotates browser-backed log files

100%

@react-native-community/checkbox

animated on/off transitions render the settled frame and the animation-stop event follows the tap synchronously; Android renders the iOS BEM control and the native Android widget branch is unassessed

100%

@walletconnect/react-native-compat

load-safe noop — this is itself a polyfill package that monkey-patches global objects (Buffer, crypto, async-storage). in Peach those globals are already wired by our compat layer so importing this is a no-op import; default export is an empty object. its only job is done, though WalletConnect itself is not exercised end to end here.

100%

expo-android-shared-preferences

native-seam only — upstream Expo module wrapper runs from the bundle; ExpoAndroidSharedPreferences provides full persistent key-value SharedPreferences operations backed by tenant localStorage

100%

expo-blob

published JavaScript runs unchanged over the native Blob SharedObject seam, following expo-blob 57.0.1 iOS byte storage, copying, slicing and UTF-8 decoding; no paired compatibility score

100%

expo-dev-client

faithful unavailable state: launching or controlling a native development client has no useful operation inside a browser-hosted simulator; the real package (`export * from 'expo-dev-menu'`) imports cleanly and exposes load-safe no-op controls without fabricating a guest dev menu. the 100% score covers clean import and this sane unavailable state, not native dev-client machinery

100%

expo-eas-client

real upstream package — not intercepted. the app's expo-eas-client JS reads the EASClient native module constants (native-seams/expo-eas-client.ts, mirroring EASClientID.swift/EASClientID.kt at 58.0.2): one persisted install uuid (UserDefaults "expo.eas-client-id" on iOS, SharedPreferences "dev.expo.EASSharedPreferences"/"eas-client-id" on Android) with platform casing, and the splitmix64 uniform value in [0, 1), bit-exact against the upstream formula. versions below 57.0.2 used different uniform math and are out of range.

100%

expo-glass-effect

liquid glass via the calibrated glassEffect materials (same oracle-diffed presets as @expo/ui glassEffect); availability helpers covered

100%

expo-ignore-battery-optimizations

faithful iOS unavailable state: the published JavaScript returns false and noops before touching its Android-only module

100%

expo-keep-awake

native-seam: upstream package JS runs against a shared host-backed Screen Wake Lock owner with Expo tag and foreground lifecycle semantics

100%

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