Golden Key TPS

One tablet, from the first sale to closing the day

Take the order, take the card, print the receipt, close the day. A POS carrying only what a shop actually does.

The SimplePOS selling screen
The app's own screen. The order on the left, the catalogue on the right.
3taps to paid
2card terminals supported
5 secto rearrange the grid
Why it is different

Learning it does not take a day

A new member of staff uses it on their first shift. There is one screen, what is used most is within reach, and wherever something could be confusing, the reason it works that way is written down.

The shop arranges its own catalogue

Putting the best sellers at the front is not alphabetical. Hold a tile for five seconds and arranging mode opens; drag to move it.

  • Add, edit and delete from the POS itself
  • Drag to reorder, let go to save
  • Anything that has been sold is hidden rather than deleted
Arranging mode
Arranging mode, opened by a five-second hold.

A discount is a swipe, not a button

No further buttons were added. Swipe an order line right to discount it, left to take it off.

  • A percentage or an amount, with quick buttons for the usual values
  • The result is shown before it is applied
  • The discount prints as its own line on the receipt
Entering a discount
Choose, see the result, then apply.

A customer is a phone number

It is what a cashier can ask for across a counter and what somebody can recite without carrying anything. A name works too.

  • Name a customer on an order and the sale earns them points
  • Nobody has to be a regular — most people who walk in are not on the books
  • A first-time customer is registered on the spot
Looking a customer up
Search by number or name; New registers one on the spot.
Payment

Paying happens where the catalogue was, with the order in view

The payment screen does not cover the POS. The right-hand side, where the products were, becomes the payment panel and the order stays on the left — because “what was that, and how much?” is asked at exactly the moment money is being taken.

Cash · card · store card · points

Pick a tender and it is collected right there. The amount pad, the request to the terminal and the card details all finish inside one screen.

  • Quick buttons for note denominations, and the exact amount
  • A note is written in place, with no popup
  • A tender the counter does not take is switched off in settings
The payment panel
The order stays on the left; payment happens on the right.

Take part of it, and the rest another way

There is no Split button. Splitting a bill is not something a cashier decides in advance — it is something they find out halfway through — so any tender can take part of the order.

  • What has been taken stacks under the order and is marked PAID
  • The balance carries straight over to the next tender
  • It records itself when the balance reaches zero — there is no Complete button
The balance after a part payment
Take some of it in cash and the balance moves to the next tender.

When it is done, the change is the biggest thing on screen

No receipt popup appears. It finishes where it started, and the one number that has to be read before the customer leaves is the largest on the screen.

  • Drawer · print · view receipt · new sale
  • An order holding money that has been collected cannot simply be left
  • A tender taken and handed back is written to the books, cash included
The completed sale
The change, and the four things to do next.
Where money is at stake

The server recalculates every amount

What the tablet sends is not taken on trust. It says what is being sold and how many; the price comes out of the catalogue on the server, is recalculated there and recorded there. Lose the tablet, or let somebody tamper with it, and the takings are still the server's figures.

01

Tax rounds once

Never per line. The tablet and the server round the same way, so the two never differ by a cent.

02

A void is not a refund

Before the batch settles nothing has moved, so it is voided; afterwards only a refund is possible. The screen keeps the rule so nobody has to remember it.

03

One order, several tenders

Some in cash, the rest on a card — or on two cards. It finishes itself when the balance reaches zero.

04

Return part of a sale

One of the three bundles comes back, so one bundle is returned. Returned a piece at a time, the parts still come to exactly what was taken.

05

Scan to ring, scan to find

Scan a product barcode and it lands in the order; scan the barcode on a receipt and that receipt opens.

06

A receipt keeps its own copy

The name and the price at the moment of sale are stored with it. Change a price later and last year's receipt still says what was charged.

07

More than one shop

Each shop keeps its own catalogue and its own takings. Two POS terminals in the same shop share the catalogue and the card balances.

08

It sells through an outage

With no server to reach, the POS records the sale itself and carries on. It uploads when the line is back, and nothing is banked twice.

09

Regulars by phone number

One number a cashier can ask for finds the customer. Naming one is optional, and most people who walk in are not on the books. Points build up and spend like a tender.

10

Where the trade comes from

A postal code asked at payment is counted by area. A known customer is not asked twice, and walk-ins are counted too — they are most of it.

11

Set an order aside

Somebody steps away, so the order is named and parked. It shows who put it down, so it survives a change of shift.

The end of the day

Closing is one screen

What was taken today, straight away

Cash, card and store card apart, with returns and voids on their own lines. Step through by day, week, month or year, and print the same figures.

  • Voids carry a count and no amount — no money moved
  • Total discount and total tax each get a line
  • The card terminal's batch close is on the same screen
The period summary
Step through the period, then print exactly that.

The paper matches the screen

What the customer was shown and what comes out of the printer are the same sections in the same order. A reprint is stamped as one and does not open the drawer.

  • Korean product names print as they are
  • A barcode at the foot of the receipt — scan it and that receipt opens
  • A split sale prints one line per tender
  • The drawer opens on cash sales only
  • Automatic printing and the automatic drawer are separate switches
  • The shop's name, address and phone print at the top
  • The printer beeps when a sale finishes — switchable
The receipt on screen
A receipt in five sections. The paper is the same.
The shop itself

Shop details and receipts are set from the POS

A changed phone number or a risen tax rate is no reason to go and find a laptop. Correct it in the POS's Settings and every other POS in that shop, and the admin site, show the same thing.

Name · address · phone · tax rate · points rate

The shop's details belong to the shop, not to the device. Correct them on one POS and the rest use the same values.

  • The rate is stored with each sale — changing it never rewrites an old receipt
  • The rate is keyed on the POS's own pad, so no keyboard's comma can get into it
  • The same fields as the store settings in the admin site
The shop's own settings
Store, inside Settings — the same fields the admin site has.

What goes above and below the receipt

The shop's name, address and phone print themselves at the top. The header is what the shop adds underneath them; the footer is the closing line at the bottom.

  • A registration number, opening hours, a returns notice
  • Clear the footer and nothing prints there
  • Receipt, batch slip, period summary and test page share one heading
Receipt layout settings
The two lines on the shop's own paper. The buzzer switch is above them.

Which tenders this counter takes

A counter with no card terminal switches cards off. The payment panel divides its width into four, so one tender nobody uses is width taken from the other three.

  • A setting on the POS, not on the shop — a terminal belongs to one counter
  • All four are on by default
  • The last one on will not go off — a POS that takes nothing cannot sell
Which tenders are offered
Settings → General → PAYMENT TYPES.
Setting up and running it

Switch the tablet on and scan one QR

01

Install from a QR

Scan the code with the tablet and the app downloads. Enter the address and the key and it sells that day.

02

Updates take themselves

A new build is picked up when the POS next launches. Nobody has to walk round the shops installing it.

03

A different key per POS

One can be shut off without touching the others, and a lost tablet means reissuing one key rather than all of them.

04

Four languages

English, Korean, Spanish or French, and dollars, euros or pesos. The receipt alone prints in English whatever the POS is set to — the person taking it away is not the person who chose the language.

“If the card terminal does not answer, the payment fails. No way to key an approval by hand was ever built.”

Chosen so that a payment nobody approved can never be recorded as a sale.
What you need

The equipment you already run

TabletAndroid 8.0 or newer, landscape. 10 inches or larger recommended
Card terminalValor or PAX, on the network. Sale, void, refund and batch close
Receipt printerESC/POS. Network (IP), Bluetooth or USB
Cash drawerWired to the printer's RJ11/RJ12 port

The terminal and the printer only have to be on the shop's network. The tablet connects to them directly, so there is no box in the middle.

Get started Read the operating guide