Privacy Policy — HMLS Sender Pro

Last updated: March 2026 Extension: HMLS Sender Pro — Bulk Messaging for WhatsApp™ Web Developer: HMLS Contact: support@hmls-sender.com

Summary

HMLS Sender Pro is a Chrome extension that helps users send personalized bulk messages on WhatsApp™ Web. We are committed to protecting your privacy. This extension stores all user data locally on your device and does not collect, transmit, or sell personal information to third parties.

Data We Collect

Data stored locally on your device

The following data is saved using Chrome's local storage (chrome.storage.local) and never leaves your device:

• User preferences: interface language, dark mode setting, source phone number
• License information: license key and instance ID (used for activation verification only)
• Free plan counter: number of messages sent in the current month, reset date
• Device fingerprint: a non-reversible hash generated from generic browser properties (screen size, language, timezone), used solely to identify the license activation instance

Data you provide directly

• Phone numbers: entered manually or imported via CSV by the user. These numbers are processed locally in the browser to send messages through WhatsApp Web. They are never stored permanently or transmitted to our servers.
• Message content: typed by the user in the extension's sidebar. Messages are sent directly through WhatsApp Web's interface and are never stored or transmitted to our servers.

Data We Do NOT Collect

We do not collect, store, or have access to:

• Names, email addresses, or physical addresses