diff --git a/README.md b/README.md
index c7120e7..497a3a3 100644
--- a/README.md
+++ b/README.md
@@ -293,3 +293,9 @@ const unleash = new UnleashClient({
 **NOTES: ⚠️**
 If `bootstrapOverride` is `true` (by default), any local cached data will be overridden with the bootstrap specified.   
 If `bootstrapOverride` is `false` any local cached data will not be overridden unless the local cache is empty.
+
+## Manage your own refresh mechanism
+
+You can opt out of the Unleash feature flag auto-refresh mechanism and metrics update by settings the `refreshInterval` and/or `metricsInterval` options to `false`. 
+In this case, it becomes your responsibility to call `updateToggles` and/or `sendMetrics` methods.
+This approach is useful in environments that do not support the `setInterval` API, such as service workers.
diff --git a/src/index.test.ts b/src/index.test.ts
index 5e22af6..7268c94 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -12,6 +12,7 @@ import {
     lastUpdateKey,
 } from './index';
 import { getTypeSafeRequest, getTypeSafeRequestUrl } from './test';
+import Metrics from './metrics';
 
 jest.useFakeTimers();
 
@@ -1657,6 +1658,26 @@ test('Should report metrics', async () => {
     client.stop();
 });
 
+test('should send metrics when sendMetrics called', async () => {
+    const config: IConfig = {
+        url: 'http://localhost/test',
+        clientKey: '12',
+        appName: 'web',
+    };
+
+    jest.spyOn(Metrics.prototype, 'sendMetrics');
+
+    const client = new UnleashClient(config);
+
+    client.start();
+
+    expect(Metrics.prototype.sendMetrics).not.toHaveBeenCalled();
+
+    await client.sendMetrics();
+
+    expect(Metrics.prototype.sendMetrics).toHaveBeenCalled();
+});
+
 test('Should emit RECOVERED event when sdkStatus is error and status is less than 400', (done) => {
     const data = { status: 200 }; // replace with the actual data you want to test
     fetchMock.mockResponseOnce(JSON.stringify(data), { status: 200 });
@@ -2268,3 +2289,54 @@ describe('Experimental options togglesStorageTTL enabled', () => {
         });
     });
 });
+
+describe('updateToggles', () => {
+    it('should not update toggles when not started', () => {
+        const config: IConfig = {
+            url: 'http://localhost/test',
+            clientKey: '12',
+            appName: 'web',
+        };
+        const client = new UnleashClient(config);
+
+        client.updateToggles();
+
+        expect(fetchMock).not.toHaveBeenCalled();
+    });
+
+    it('should update toggles when started', async () => {
+        const config: IConfig = {
+            url: 'http://localhost/test',
+            clientKey: '12',
+            appName: 'web',
+        };
+        const client = new UnleashClient(config);
+
+        await client.start();
+        fetchMock.mockClear();
+
+        client.updateToggles();
+
+        expect(fetchMock).toHaveBeenCalled();
+    });
+
+    it('should wait for client readiness before the toggles update', async () => {
+        const config: IConfig = {
+            url: 'http://localhost/test',
+            clientKey: '12',
+            appName: 'web',
+            refreshInterval: 0,
+        };
+        const client = new UnleashClient(config);
+
+        client.start();
+
+        client.updateToggles();
+
+        expect(fetchMock).not.toHaveBeenCalled();
+
+        client.emit(EVENTS.READY);
+
+        expect(fetchMock).toHaveBeenCalledTimes(1);
+    });
+});
diff --git a/src/index.ts b/src/index.ts
index cf70075..323208f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -322,7 +322,7 @@ export class UnleashClient extends TinyEmitter {
         return { ...variant, feature_enabled: enabled };
     }
 
-    private async updateToggles() {
+    public async updateToggles() {
         if (this.timerRef || this.fetchedFromServer) {
             await this.fetchToggles();
         } else if (this.started) {
@@ -446,6 +446,10 @@ export class UnleashClient extends TinyEmitter {
         return this.sdkState === 'error' ? this.lastError : undefined;
     }
 
+    public sendMetrics() {
+        return this.metrics.sendMetrics();
+    }
+
     private async resolveSessionId(): Promise<string> {
         if (this.context.sessionId) {
             return this.context.sessionId;