diff --git a/.changeset/config.json b/.changeset/config.json
index c59a15f4d7f..dbc6b9042c1 100644
--- a/.changeset/config.json
+++ b/.changeset/config.json
@@ -1,6 +1,9 @@
 {
   "$schema": "https://unpkg.com/@changesets/config@1.1.0/schema.json",
-  "changelog": ["../repo-scripts/changelog-generator", { "repo": "firebase/firebase-js-sdk"}],
+  "changelog": [
+    "../repo-scripts/changelog-generator",
+    { "repo": "firebase/firebase-js-sdk" }
+  ],
   "commit": false,
   "linked": [],
   "access": "public",
@@ -20,6 +23,7 @@
     "@firebase/functions-types-exp",
     "@firebase/installations-exp",
     "@firebase/installations-types-exp",
+    "@firebase/installations-compat",
     "@firebase/messaging-exp",
     "@firebase/messaging-types-exp",
     "@firebase/performance-exp",
diff --git a/packages-exp/installations-compat/.eslintrc.js b/packages-exp/installations-compat/.eslintrc.js
new file mode 100644
index 00000000000..ca80aa0f69a
--- /dev/null
+++ b/packages-exp/installations-compat/.eslintrc.js
@@ -0,0 +1,26 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+module.exports = {
+  extends: '../../config/.eslintrc.js',
+  parserOptions: {
+    project: 'tsconfig.json',
+    // to make vscode-eslint work with monorepo
+    // https://github.com/typescript-eslint/typescript-eslint/issues/251#issuecomment-463943250
+    tsconfigRootDir: __dirname
+  }
+};
diff --git a/packages-exp/installations-compat/karma.conf.js b/packages-exp/installations-compat/karma.conf.js
new file mode 100644
index 00000000000..1699a0681ec
--- /dev/null
+++ b/packages-exp/installations-compat/karma.conf.js
@@ -0,0 +1,35 @@
+/**
+ * @license
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const karmaBase = require('../../config/karma.base');
+
+const files = [`src/**/*.test.ts`];
+
+module.exports = function (config) {
+  const karmaConfig = {
+    ...karmaBase,
+    // files to load into karma
+    files,
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['mocha']
+  };
+
+  config.set(karmaConfig);
+};
+
+module.exports.files = files;
diff --git a/packages-exp/installations-compat/package.json b/packages-exp/installations-compat/package.json
new file mode 100644
index 00000000000..7423f473af5
--- /dev/null
+++ b/packages-exp/installations-compat/package.json
@@ -0,0 +1,63 @@
+{
+  "name": "@firebase/installations-compat",
+  "version": "0.0.900",
+  "private": true,
+  "author": "Firebase <firebase-support@google.com> (https://firebase.google.com/)",
+  "main": "dist/index.cjs.js",
+  "module": "dist/index.esm.js",
+  "browser": "dist/index.esm.js",
+  "esm2017": "dist/index.esm2017.js",
+  "typings": "dist/installations-compat.d.ts",
+  "license": "Apache-2.0",
+  "files": ["dist"],
+  "scripts": {
+    "lint": "eslint -c .eslintrc.js '**/*.ts' --ignore-path '../../.gitignore'",
+    "lint:fix": "eslint --fix -c .eslintrc.js '**/*.ts' --ignore-path '../../.gitignore'",
+    "build": "rollup -c",
+    "build:deps": "lerna run --scope @firebase/installations-compat --include-dependencies build",
+    "build:release": "rollup -c rollup.config.release.js",
+    "dev": "rollup -c -w",
+    "test": "yarn type-check && yarn test:karma && yarn lint",
+    "test:ci": "node ../../scripts/run_tests_in_ci.js",
+    "test:karma": "karma start --single-run",
+    "test:debug": "karma start --browsers=Chrome --auto-watch",
+    "type-check": "tsc -p . --noEmit",
+    "serve": "yarn serve:build && yarn serve:host",
+    "serve:build": "rollup -c test-app/rollup.config.js",
+    "serve:host": "http-server -c-1 test-app",
+    "prepare": "yarn build:release",
+    "api-report": "api-extractor run --local --verbose",
+    "predoc": "node ../../scripts/exp/remove-exp.js temp",
+    "doc": "api-documenter markdown --input temp --output docs",
+    "build:doc": "yarn build && yarn doc"
+  },
+  "repository": {
+    "directory": "packages-exp/installations-compat",
+    "type": "git",
+    "url": "https://github.com/firebase/firebase-js-sdk.git"
+  },
+  "bugs": {
+    "url": "https://github.com/firebase/firebase-js-sdk/issues"
+  },
+  "devDependencies": {
+    "@firebase/app-compat": "0.0.900",
+    "rollup": "2.33.2",
+    "@rollup/plugin-commonjs": "15.1.0",
+    "@rollup/plugin-json": "4.1.0",
+    "@rollup/plugin-node-resolve": "9.0.0",
+    "rollup-plugin-typescript2": "0.29.0",
+    "rollup-plugin-uglify": "6.0.4",
+    "typescript": "4.0.5"
+  },
+  "peerDependencies": {
+    "@firebase/app-compat": "0.x"
+  },
+  "dependencies": {
+    "@firebase/installations-exp": "0.0.900",
+    "@firebase/installations-types-exp": "0.0.900",
+    "@firebase/util": "0.3.4",
+    "@firebase/component": "0.1.21",
+    "idb": "3.0.2",
+    "tslib": "^1.11.1"
+  }
+}
diff --git a/packages-exp/installations-compat/rollup.config.js b/packages-exp/installations-compat/rollup.config.js
new file mode 100644
index 00000000000..d66e464f546
--- /dev/null
+++ b/packages-exp/installations-compat/rollup.config.js
@@ -0,0 +1,53 @@
+/**
+ * @license
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import json from '@rollup/plugin-json';
+import typescriptPlugin from 'rollup-plugin-typescript2';
+import typescript from 'typescript';
+import { es2017BuildsNoPlugin, es5BuildsNoPlugin } from './rollup.shared';
+
+/**
+ * ES5 Builds
+ */
+const es5BuildPlugins = [typescriptPlugin({ typescript }), json()];
+
+const es5Builds = es5BuildsNoPlugin.map(build => ({
+  ...build,
+  plugins: es5BuildPlugins
+}));
+
+/**
+ * ES2017 Builds
+ */
+const es2017BuildPlugins = [
+  typescriptPlugin({
+    typescript,
+    tsconfigOverride: {
+      compilerOptions: {
+        target: 'es2017'
+      }
+    }
+  }),
+  json({ preferConst: true })
+];
+
+const es2017Builds = es2017BuildsNoPlugin.map(build => ({
+  ...build,
+  plugins: es2017BuildPlugins
+}));
+
+export default [...es5Builds, ...es2017Builds];
diff --git a/packages-exp/installations-compat/rollup.config.release.js b/packages-exp/installations-compat/rollup.config.release.js
new file mode 100644
index 00000000000..5050932f4a4
--- /dev/null
+++ b/packages-exp/installations-compat/rollup.config.release.js
@@ -0,0 +1,71 @@
+/**
+ * @license
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import json from '@rollup/plugin-json';
+import typescriptPlugin from 'rollup-plugin-typescript2';
+import typescript from 'typescript';
+import { importPathTransformer } from '../../scripts/exp/ts-transform-import-path';
+import { es2017BuildsNoPlugin, es5BuildsNoPlugin } from './rollup.shared';
+
+/**
+ * ES5 Builds
+ */
+const es5BuildPlugins = [
+  typescriptPlugin({
+    typescript,
+    clean: true,
+    abortOnError: false,
+    transformers: [importPathTransformer]
+  }),
+  json()
+];
+
+const es5Builds = es5BuildsNoPlugin.map(build => ({
+  ...build,
+  plugins: es5BuildPlugins,
+  treeshake: {
+    moduleSideEffects: false
+  }
+}));
+
+/**
+ * ES2017 Builds
+ */
+const es2017BuildPlugins = [
+  typescriptPlugin({
+    typescript,
+    tsconfigOverride: {
+      compilerOptions: {
+        target: 'es2017'
+      }
+    },
+    abortOnError: false,
+    clean: true,
+    transformers: [importPathTransformer]
+  }),
+  json({ preferConst: true })
+];
+
+const es2017Builds = es2017BuildsNoPlugin.map(build => ({
+  ...build,
+  plugins: es2017BuildPlugins,
+  treeshake: {
+    moduleSideEffects: false
+  }
+}));
+
+export default [...es5Builds, ...es2017Builds];
diff --git a/packages-exp/installations-compat/rollup.shared.js b/packages-exp/installations-compat/rollup.shared.js
new file mode 100644
index 00000000000..ca79f888314
--- /dev/null
+++ b/packages-exp/installations-compat/rollup.shared.js
@@ -0,0 +1,48 @@
+/**
+ * @license
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import pkg from './package.json';
+
+const deps = Object.keys({ ...pkg.peerDependencies, ...pkg.dependencies });
+
+/**
+ * ES5 Builds
+ */
+export const es5BuildsNoPlugin = [
+  {
+    input: 'src/index.ts',
+    output: [
+      { file: pkg.main, format: 'cjs', sourcemap: true },
+      { file: pkg.module, format: 'es', sourcemap: true }
+    ],
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  }
+];
+
+/**
+ * ES2017 Builds
+ */
+export const es2017BuildsNoPlugin = [
+  {
+    input: 'src/index.ts',
+    output: {
+      file: pkg.esm2017,
+      format: 'es',
+      sourcemap: true
+    },
+    external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
+  }
+];
diff --git a/packages-exp/installations-compat/src/index.ts b/packages-exp/installations-compat/src/index.ts
new file mode 100644
index 00000000000..dab8ad4607d
--- /dev/null
+++ b/packages-exp/installations-compat/src/index.ts
@@ -0,0 +1,51 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { firebase } from '@firebase/app-compat';
+import { name, version } from '../package.json';
+import { _FirebaseNamespace } from '@firebase/app-types/private';
+import { Component, ComponentType } from '@firebase/component';
+import { FirebaseInstallations as FirebaseInstallationsCompat } from '@firebase/installations-types';
+import { FirebaseApp } from '@firebase/app-types';
+import { InstallationsCompat } from './installationsCompat';
+
+declare module '@firebase/component' {
+  interface NameServiceMapping {
+    'app-compat': FirebaseApp;
+    'installations-compat': FirebaseInstallationsCompat;
+  }
+}
+
+function registerInstallations(instance: _FirebaseNamespace): void {
+  instance.INTERNAL.registerComponent(
+    new Component(
+      'installations-compat',
+      container => {
+        const app = container.getProvider('app-compat').getImmediate()!;
+        const installations = container
+          .getProvider('installations-exp')
+          .getImmediate()!;
+        return new InstallationsCompat(app, installations);
+      },
+      ComponentType.PUBLIC
+    )
+  );
+
+  instance.registerVersion(name, version);
+}
+
+registerInstallations(firebase as _FirebaseNamespace);
diff --git a/packages-exp/installations-compat/src/installationsCompat.test.ts b/packages-exp/installations-compat/src/installationsCompat.test.ts
new file mode 100644
index 00000000000..1f3442c4d86
--- /dev/null
+++ b/packages-exp/installations-compat/src/installationsCompat.test.ts
@@ -0,0 +1,85 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import './testing/setup';
+import { getFakeApp, getFakeInstallations } from './testing/util';
+import { InstallationsCompat } from './installationsCompat';
+import * as modularApi from '@firebase/installations-exp';
+import { expect } from 'chai';
+import { stub } from 'sinon';
+
+describe('Installations Compat', () => {
+  let installationsCompat!: InstallationsCompat;
+  const installations = getFakeInstallations();
+  before(() => {
+    installationsCompat = new InstallationsCompat(getFakeApp(), installations);
+  });
+
+  it('getId calls modular getId()', async () => {
+    const fakeFid = 'fake-fid';
+    const modularGetIdStub = stub(modularApi, 'getId').callsFake(() =>
+      Promise.resolve(fakeFid)
+    );
+
+    const res = await installationsCompat.getId();
+
+    expect(res).to.equal(fakeFid);
+    expect(modularGetIdStub).to.have.been.calledWithExactly(installations);
+  });
+
+  it('getToken calls modular getToken()', async () => {
+    const fakeToken = 'fake-token';
+    const modularGetTokenStub = stub(modularApi, 'getToken').callsFake(() =>
+      Promise.resolve(fakeToken)
+    );
+
+    const res = await installationsCompat.getToken();
+
+    expect(res).to.equal(fakeToken);
+    expect(modularGetTokenStub).to.have.been.calledWithExactly(
+      installations,
+      undefined
+    );
+  });
+
+  it('delete calls modular deleteInstallations()', async () => {
+    const modularDeleteStub = stub(
+      modularApi,
+      'deleteInstallations'
+    ).callsFake(() => Promise.resolve());
+
+    await installationsCompat.delete();
+
+    expect(modularDeleteStub).to.have.been.calledWithExactly(installations);
+  });
+
+  it('onIdChange calls modular onIdChange()', () => {
+    const fakeIdChangeCallbackFn = stub();
+    const fakeIdChangeUnsubscribeFn = stub();
+    const modularOnIdChangeStub = stub(modularApi, 'onIdChange').callsFake(
+      () => fakeIdChangeUnsubscribeFn
+    );
+
+    const res = installationsCompat.onIdChange(fakeIdChangeCallbackFn);
+
+    expect(res).to.equal(fakeIdChangeUnsubscribeFn);
+    expect(modularOnIdChangeStub).to.have.been.calledWith(
+      installations,
+      fakeIdChangeCallbackFn
+    );
+  });
+});
diff --git a/packages-exp/installations-compat/src/installationsCompat.ts b/packages-exp/installations-compat/src/installationsCompat.ts
new file mode 100644
index 00000000000..467a9cae4f2
--- /dev/null
+++ b/packages-exp/installations-compat/src/installationsCompat.ts
@@ -0,0 +1,50 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { FirebaseInstallations } from '@firebase/installations-types-exp';
+import { FirebaseInstallations as FirebaseInstallationsCompat } from '@firebase/installations-types';
+import { FirebaseApp } from '@firebase/app-types';
+import { FirebaseService } from '@firebase/app-types/private';
+import {
+  deleteInstallations,
+  getId,
+  getToken,
+  IdChangeCallbackFn,
+  IdChangeUnsubscribeFn,
+  onIdChange
+} from '@firebase/installations-exp';
+
+export class InstallationsCompat
+  implements FirebaseInstallationsCompat, FirebaseService {
+  constructor(
+    public app: FirebaseApp,
+    private _installations: FirebaseInstallations
+  ) {}
+
+  getId(): Promise<string> {
+    return getId(this._installations);
+  }
+  getToken(forceRefresh?: boolean): Promise<string> {
+    return getToken(this._installations, forceRefresh);
+  }
+  delete(): Promise<void> {
+    return deleteInstallations(this._installations);
+  }
+  onIdChange(callback: IdChangeCallbackFn): IdChangeUnsubscribeFn {
+    return onIdChange(this._installations, callback);
+  }
+}
diff --git a/packages-exp/installations-compat/src/testing/setup.ts b/packages-exp/installations-compat/src/testing/setup.ts
new file mode 100644
index 00000000000..463089fa69b
--- /dev/null
+++ b/packages-exp/installations-compat/src/testing/setup.ts
@@ -0,0 +1,26 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { use } from 'chai';
+import { restore } from 'sinon';
+import * as sinonChai from 'sinon-chai';
+
+use(sinonChai);
+
+afterEach(async () => {
+  restore();
+});
diff --git a/packages-exp/installations-compat/src/testing/util.ts b/packages-exp/installations-compat/src/testing/util.ts
new file mode 100644
index 00000000000..ad124e13236
--- /dev/null
+++ b/packages-exp/installations-compat/src/testing/util.ts
@@ -0,0 +1,55 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { FirebaseApp } from '@firebase/app-types';
+import { FirebaseInstallations } from '@firebase/installations-types-exp';
+
+const appName = 'testApp';
+const apiKey = 'AIzaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaA';
+const projectId = 'fis-test-app';
+const appId = '1:777777777777:web:aaaaaaaaaaaaaaaa';
+
+export function getFakeApp(): FirebaseApp {
+  return {
+    name: appName,
+    options: {
+      apiKey,
+      projectId,
+      authDomain: 'authDomain',
+      messagingSenderId: 'messagingSenderId',
+      databaseURL: 'databaseUrl',
+      storageBucket: 'storageBucket',
+      appId
+    },
+    automaticDataCollectionEnabled: true,
+    delete: async () => {}
+  };
+}
+
+export function getFakeInstallations(): FirebaseInstallations {
+  return {
+    app: getFakeApp(),
+    appConfig: {
+      appName,
+      projectId,
+      apiKey,
+      appId
+    },
+    platformLoggerProvider: null,
+    _delete: () => Promise.resolve()
+  };
+}
diff --git a/packages-exp/installations-compat/tsconfig.json b/packages-exp/installations-compat/tsconfig.json
new file mode 100644
index 00000000000..420eda97a1d
--- /dev/null
+++ b/packages-exp/installations-compat/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "extends": "../../config/tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "downlevelIteration": true,
+    "resolveJsonModule": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true
+  },
+  "include": ["src"],
+  "exclude": ["dist/**/*"]
+}