Quarterseen

For independent instrument makers

Software to run your workshop.

Quarterseen holds your price list, build schedule, invoices, customer records and bookkeeping in one place. It was built by a guitar maker to run his own shop, and Padalka Guitars uses it every day.

Build schedule

Every build gets a start and a finish date. They are calculated from the order of your queue, how many builds you finish in a year, how long a build takes and the weeks the shop is closed. Move a build up the queue or book two weeks off in July and the dates after it change with it. One build can be set to take longer than the rest without changing the others. The dates ahead of today are worked out again every time you open the page, so a build that has not started when it should have moves back and takes everything queued behind it with it, instead of the delay piling up out of sight.

JunJulAugSepOctNov DecJan2027FebMarAprMay
#201 Model A
#202 Model B
#203 Model C
#204 Model A
#205 Model B
#206 Model C 7mo
#207 Model A
#208 Model B
#209 Model C
#210 Model A
#211 Model B
#212 Model C
#213 Model A
#214 Model B
#215 Model C
in production projected finished closed 7 in production · 20 a year · 5 months each

Price list

Your models, options and prices are kept in a list you edit yourself. Prices that depend on other choices — a single-piece body that adds 50% of the body wood's price, an option only offered on some models — are set up as rules, and each rule is written back to you as a sentence so you can check it. Each year's list is kept separately, so a build quoted last year keeps last year's prices. The same list can be embedded into any website, so a customer can configure an instrument and see your price for it.

Specs · 2026 listModel B
ModelModel B$4,200
Body woodBlack limba$420
Top woodMaple burl$400
Body buildSingle piece$210
Strings7$150
FinishCeruse, matte$600
Matching backNo—
What these specs price at$5,980
When Body build is Single piece → add 50% of Body wood, rounded to $10, at least $150
When Matching back is on → add 100% of Top wood, at least $200
Model B is not sold as an 8-string

Invoices and payments

Invoices use your own numbering and tax rate, and a build can be invoiced in full or one instalment at a time. Customers can pay by card through your own Stripe account, or by bank transfer, PayPal or Wise.

Sample Shop
Anytown · Tax no. 000 000 000
INVOICE sent
INV-0012
Issued 3 Sep 2026 · Due 17 Sep 2026
BILL TO
Sample Customer
1 Sample Street, Anytown
DescriptionQtyAmount
Deposit — 50% Model B, #012 1 $2,990.00
Subtotal$2,990.00
Sales tax 12%$358.80
Total$3,348.80
HOW TO PAY
Pay by card Bank transfer · your own details

Client portal

Each customer gets a link to a page of their own, listing every build they have with you: where it has got to, what they ordered, when it is expected and what is left to pay. They approve the design there, or write down what is wrong with it, and that note is kept beside the build for as long as you have it. Invoices you have sent can be paid from the same page.

Sample Shop#012
Where it is In production
Expected to finish March 2027
Design · third version
Approve this design
Can we see the horns a little softer?
What you ordered
ModelModel B
Body woodBlack limba
Top woodMaple burl
Body buildSingle piece
Strings7
FinishCeruse, matte
Left to pay $2,990due when it ships

Bookkeeping

If you are paid in one currency and spend in another, each currency is kept as its own account and converted into the one you file your taxes in. Statements come in as a CSV file, or sync on their own if you bank with Wise, and rules you write once file each line under a category. Forward a receipt from your inbox and it becomes a line with the original attached, waiting for the statement to confirm it. The year gives you a balance per currency, a profit and loss, and a CSV for your accountant.

Ledger · 2026USD
16 Sep Sample Customer Bank · INV-0012 · linked to #012 deposit +$3,348.80
14 Sep Order #1042 confirmed from email · waiting to be confirmed −$522.80
11 Sep Parts supplier Bank · Materials −$214.35
9 Sep Transfer to personal account Bank · Owner's draw −$2,500.00
Income$29,912
Expenses−$11,406
Profit$18,506
Owner's draw−$16,500
Change in the business this yearwhat the year added, not what the account holds +$2,006

The rest of it

A parts list for each model that copies onto a new build. A shopping list of what still has to be ordered. Time tracking, with your own names for the kinds of work. Customer records and the enquiries that come in from your website.

Get in touch

If you build instruments and want to try this, send a message. Tell me what you build and roughly how many are on your list.