Dated Price List with Change History and Customer Lists Sent

Dated Price List is an offline app (one HTML file in a zip). You list your items once, then record every price as a change with the date it starts: today, next week or the first of next month. The app works out the price in force today, the one before it, the next one, and the trade and wholesale prices from your two discount percentages. You log which list you sent to which customer and the app shows who is now holding a list that no longer matches your prices.

The problem it removes: The price list is an old file with prices edited by hand. A supplier raises costs from the first of the month and someone has to remember to change thirty prices on the day. Nobody can say what the price was in March, who was sent the old list, or whether a price was a typing slip. This app keeps each price as a dated change, blocks the obvious slips, and tells you which customers need the new list.

What is inside:

• Items with code, group, unit, an optional lowest price you never go under, and a discontinued tick
• Price changes with start date and reason, so next month's prices are entered now and switch on by themselves
• The price in force today, the previous price, the change in percent and the next scheduled price for every item
• Trade and wholesale prices worked out from percentages you set, and the price with VAT at the rate you set
• Checks: a change bigger than your limit needs a note, no price below the lowest price, one change per item per date, a correction must say what was wrong
• Customers with their price tier and a log of the list sent to each, with out-of-date lists flagged and a WhatsApp reminder link
• Printable retail, trade and wholesale price lists (A4) and a price change notice for any period
• 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: distributors, wholesalers, suppliers, workshops and shops that publish a price list, change prices several times a year and send the list to named customers.

What it is NOT: It is not a stock, costing or margin tool: it holds selling prices only and does not read supplier invoices or change prices in any till. It does not know your costs, your competitors or what you may legally charge. VAT and discounts are settings you enter, and nothing here is tax advice. It does not send the list for you: it opens WhatsApp with a message ready. 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 (158 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 2395 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).