diff --git a/packages/build-tools/src/android/__tests__/gradle.test.ts b/packages/build-tools/src/android/__tests__/gradle.test.ts
new file mode 100644
index 0000000000..fb52f19894
--- /dev/null
+++ b/packages/build-tools/src/android/__tests__/gradle.test.ts
@@ -0,0 +1,50 @@
+import { Platform } from '@expo/eas-build-job';
+import spawn from '@expo/turtle-spawn';
+import fs from 'fs-extra';
+
+import { runGradleCommand } from '../gradle';
+
+jest.mock('@expo/turtle-spawn', () => ({
+  __esModule: true,
+  default: jest.fn(),
+}));
+
+jest.mock('fs-extra', () => ({
+  chmod: jest.fn().mockResolvedValue(undefined),
+}));
+
+describe(runGradleCommand, () => {
+  beforeEach(() => {
+    const spawnPromise = Promise.resolve(undefined) as any;
+    spawnPromise.child = { pid: 123 };
+    (spawn as jest.Mock).mockReturnValue(spawnPromise);
+    (fs.chmod as unknown as jest.Mock).mockClear();
+    (spawn as jest.Mock).mockClear();
+  });
+
+  it('allows Sentry upload failures by default', async () => {
+    await runGradleCommand(
+      {
+        env: { EAS_BUILD_RUNNER: 'eas-build' },
+        job: {
+          platform: Platform.ANDROID,
+        },
+      } as any,
+      {
+        logger: { info: jest.fn() } as any,
+        gradleCommand: ':app:bundleRelease',
+        androidDir: '/app/android',
+      }
+    );
+
+    expect(spawn).toHaveBeenCalledWith(
+      'bash',
+      ['-c', './gradlew :app:bundleRelease --profile '],
+      expect.objectContaining({
+        env: expect.objectContaining({
+          SENTRY_ALLOW_FAILURE: 'true',
+        }),
+      })
+    );
+  });
+});
diff --git a/packages/build-tools/src/android/gradle.ts b/packages/build-tools/src/android/gradle.ts
index 9f616ad1c5..cf90524302 100644
--- a/packages/build-tools/src/android/gradle.ts
+++ b/packages/build-tools/src/android/gradle.ts
@@ -7,6 +7,7 @@ import path from 'path';
 
 import { BuildContext } from '../context';
 import { getParentAndDescendantProcessPidsAsync } from '../utils/processes';
+import { resolveSentryUploadEnv } from '../utils/buildEnv';
 
 export async function ensureLFLineEndingsInGradlewScript<TJob extends Job>(
   ctx: BuildContext<TJob>
@@ -31,6 +32,7 @@ export async function runGradleCommand(
   logger.info(`Running 'gradlew ${gradleCommand}' in ${androidDir}`);
   await fs.chmod(path.join(androidDir, 'gradlew'), 0o755);
   const verboseFlag = ctx.env['EAS_VERBOSE'] === '1' ? '--info' : '';
+  const env = { ...ctx.env, ...extraEnv };
 
   const spawnPromise = spawn(
     'bash',
@@ -46,8 +48,8 @@ export async function runGradleCommand(
         }
       },
       env: {
-        ...ctx.env,
-        ...extraEnv,
+        ...resolveSentryUploadEnv(env),
+        ...env,
         ...resolveVersionOverridesEnvs(ctx),
         LC_ALL: 'C.UTF-8',
       },
diff --git a/packages/build-tools/src/ios/__tests__/fastlane.test.ts b/packages/build-tools/src/ios/__tests__/fastlane.test.ts
index c066c78cf5..ff3c1ffe89 100644
--- a/packages/build-tools/src/ios/__tests__/fastlane.test.ts
+++ b/packages/build-tools/src/ios/__tests__/fastlane.test.ts
@@ -23,13 +23,19 @@ const WORKING_DIR = '/workingdir';
 // BuildContext.getReactNativeProjectDirectory() nests the RN project under `${workingdir}/build`.
 const IOS_DIR = path.join(WORKING_DIR, 'build', 'ios');
 
-function makeIosBuildContext({ simulator }: { simulator: boolean }): BuildContext<Ios.Job> {
+function makeIosBuildContext({
+  simulator,
+  env = {},
+}: {
+  simulator: boolean;
+  env?: Record<string, string>;
+}): BuildContext<Ios.Job> {
   const job: Ios.Job = { ...createTestIosJob(), simulator };
   return new BuildContext(job, {
     workingdir: WORKING_DIR,
     logger: createMockLogger(),
     logBuffer: { getLogs: () => [], getPhaseLogs: () => [] },
-    env: { __API_SERVER_URL: 'http://api.expo.test' },
+    env: { __API_SERVER_URL: 'http://api.expo.test', ...env },
     uploadArtifact: jest.fn(),
   });
 }
@@ -125,4 +131,27 @@ describe(runFastlaneGym, () => {
       workspacePath: IOS_DIR,
     });
   });
+
+  it('allows Sentry upload failures by default', async () => {
+    const ctx = makeIosBuildContext({
+      simulator: false,
+      env: { EAS_BUILD_RUNNER: 'eas-build' },
+    });
+
+    await runFastlaneGym(ctx, {
+      scheme: 'App',
+      credentials: ARCHIVE_CREDENTIALS,
+      entitlements: null,
+    });
+
+    expect(spawn).toHaveBeenCalledWith(
+      'fastlane',
+      ['gym'],
+      expect.objectContaining({
+        env: expect.objectContaining({
+          SENTRY_ALLOW_FAILURE: 'true',
+        }),
+      })
+    );
+  });
 });
diff --git a/packages/build-tools/src/ios/fastlane.ts b/packages/build-tools/src/ios/fastlane.ts
index 771cc902c3..43e5cca0c3 100644
--- a/packages/build-tools/src/ios/fastlane.ts
+++ b/packages/build-tools/src/ios/fastlane.ts
@@ -13,6 +13,7 @@ import { isTVOS } from './tvos';
 import { XcodeBuildLogger } from './xcpretty';
 import { COMMON_FASTLANE_ENV } from '../common/fastlane';
 import { BuildContext, SkipNativeBuildError } from '../context';
+import { resolveSentryUploadEnv } from '../utils/buildEnv';
 
 export async function runFastlaneGym<TJob extends Ios.Job>(
   ctx: BuildContext<TJob>,
@@ -48,11 +49,12 @@ export async function runFastlaneGym<TJob extends Ios.Job>(
   }
   const buildLogger = new XcodeBuildLogger(ctx.logger, ctx.getReactNativeProjectDirectory());
   void buildLogger.watchLogFiles(ctx.buildLogsDirectory);
+  const env = { ...ctx.env, ...extraEnv };
   try {
     await runFastlane(['gym'], {
       cwd: workspacePath,
       logger: ctx.logger,
-      env: { ...ctx.env, ...extraEnv },
+      env: { ...resolveSentryUploadEnv(env), ...env },
     });
   } finally {
     await buildLogger.flush();
diff --git a/packages/build-tools/src/utils/__tests__/buildEnv.test.ts b/packages/build-tools/src/utils/__tests__/buildEnv.test.ts
new file mode 100644
index 0000000000..16be4053d4
--- /dev/null
+++ b/packages/build-tools/src/utils/__tests__/buildEnv.test.ts
@@ -0,0 +1,22 @@
+import { resolveSentryUploadEnv } from '../buildEnv';
+
+describe(resolveSentryUploadEnv, () => {
+  it('allows Sentry upload failures by default', () => {
+    expect(resolveSentryUploadEnv({ EAS_BUILD_RUNNER: 'eas-build' })).toEqual({
+      SENTRY_ALLOW_FAILURE: 'true',
+    });
+  });
+
+  it('does not change Sentry upload behavior outside hosted EAS Build', () => {
+    expect(resolveSentryUploadEnv({})).toEqual({});
+  });
+
+  it('preserves explicit Sentry upload behavior', () => {
+    expect(
+      resolveSentryUploadEnv({ EAS_BUILD_RUNNER: 'eas-build', SENTRY_ALLOW_FAILURE: 'false' })
+    ).toEqual({});
+    expect(
+      resolveSentryUploadEnv({ EAS_BUILD_RUNNER: 'eas-build', SENTRY_DISABLE_AUTO_UPLOAD: 'true' })
+    ).toEqual({});
+  });
+});
diff --git a/packages/build-tools/src/utils/buildEnv.ts b/packages/build-tools/src/utils/buildEnv.ts
new file mode 100644
index 0000000000..c29c566772
--- /dev/null
+++ b/packages/build-tools/src/utils/buildEnv.ts
@@ -0,0 +1,13 @@
+import type { Env } from '@expo/eas-build-job';
+
+export function resolveSentryUploadEnv(env: Env): Env {
+  if (
+    env.EAS_BUILD_RUNNER !== 'eas-build' ||
+    env.SENTRY_ALLOW_FAILURE ||
+    env.SENTRY_DISABLE_AUTO_UPLOAD
+  ) {
+    return {};
+  }
+
+  return { SENTRY_ALLOW_FAILURE: 'true' };
+}