WhatsApp Broadcast List Manager with Opt-In Record and Send Sheet

WhatsApp Broadcast List Manager is an offline app (one HTML file in a zip). You keep your customers in lists, write down when and how each person agreed to receive your messages, and run a campaign: the app builds a send sheet of the people who can be messaged, and each row opens WhatsApp with the message already written for that person. You press send in WhatsApp, come back and mark the row Sent, Replied or Opted out.

The problem it removes: Customer numbers live in phone contacts and old chats. Nobody remembers who agreed to receive offers, who asked to stop, who was messaged last week and who never answered. The same message goes to the same people twice, a person who said stop gets another offer, and the shop owner copies and pastes for an hour. This app keeps the list, the permission note and the send history in one place.

What is inside:

• Lists, and contacts with phone numbers saved in one UAE format, a name to use in messages, and a record of when and how they agreed
• A status for every contact worked out for you: Ready, Resting, Not opted in, Stopped or Wrong number
• Campaigns with a greeting, your message text and a sign-off, linked to one list, with only one campaign running at a time
• A send sheet: one button builds the list of ready people for the running campaign, then one tap per person opens WhatsApp with their message written
• One-tap results: Sent, Replied, Opted out, Wrong number. An opted out reply stops that person from every later campaign
• Printable opt-in register and campaign sheet, and charts of people reached per campaign
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: shop owners, cafe and bakery owners, salon and clinic receptionists, tutors, florists and anyone who sends offers or news to their own customers by WhatsApp and wants a clear record of who agreed.

What it is NOT: It does not send messages: it opens WhatsApp with the message ready and you press send. It does not connect to WhatsApp Business, does not verify that anyone agreed, and does not tell you what the rules are for marketing messages, which is for you to check with WhatsApp and the authorities that apply to you. Keep names and numbers only, no sensitive details. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (143 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 1173 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).