Spoolworth: 3D Print Profit
Cost calculator & profit log
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Know what a print really costs before you price it. Power, machine wear, the plates that failed, marketplace fees. All of it in the number you charge.
Calculator apps tell you what a print costs. Spoolworth tells you whether your side hustle is actually working.
TRUE COST, NOT JUST FILAMENT
Filament is one of six things a print costs you. Spoolworth adds what the free calculators skip:
- Electricity - print hours x your printer's real wattage x your local rate
- Printer wear - your printer's price spread over its working life
- Failed prints - a failure buffer so reprints don't eat your margin
- Multi-color purge waste - AMS jobs waste grams on every color change
- Your time - hands-on minutes at your hourly rate
- Consumables - glue, IPA, sandpaper, packaging
START FROM YOUR SLICER
Import G-code or a sliced .3mf straight from Bambu Studio, OrcaSlicer, PrusaSlicer or Cura - grams and print time fill themselves, multi-plate files included. You can also open a sliced file from Files or AirDrop and it lands in a quote.
PRICE IT TO ACTUALLY PROFIT
Set a markup and get a suggested price - with your real margin and break-even shown beside it. Selling on a marketplace? Pick Etsy, eBay, Amazon Handmade or Shopify and that platform's real fees are grossed up so you keep the margin you asked for - the app shows what to list at and what you'll pocket, net of fees. Etsy's flat fees stay editable, because Etsy charges those in US dollars wherever you sell.
SEND A QUOTE YOUR BUYER CAN READ
Share a clean price card by Messages or email - your price, what it includes, and an optional valid-until date. Your costs, margin and fees never leave the app.
TRACK EVERY JOB
Save quotes as jobs with a photo, buyer and quantity. Move them from quoted to printed to sold. Costs are frozen the day you quote - later price changes never rewrite your history.
BRING IN YOUR ETSY SALES
Import your Etsy "Sold Order Items" CSV and your real sales history fills your jobs and dashboard. No account connection required.
KNOW IF IT'S WORKING (PRO)
A profit dashboard breaks down revenue, cost and profit by month. If a print line isn't paying for itself, you'll see it.
NEVER RUN DRY MID-PRINT (PRO)
Spool inventory tracks the grams left on every spool. Printed jobs deduct automatically - purge waste included - and you get a warning before a spool runs out.
QUOTE STRAIGHT OFF A SPOOL (PRO)
Pick the spool you'll print from and its real cost per kilo flows into the quote - then the job deducts from that spool when you print it.
HANDS-FREE WITH SIRI
"Log a sale in Spoolworth" and "How's my Spoolworth month" work from Siri, the Shortcuts app and Spotlight.
WORKS WITH YOUR PRINTER
Presets for Bambu Lab P1S, A1, X1 Carbon, Prusa MK4 and Ender 3 prefill wattage and depreciation. Everything stays editable, and you can add any printer.
PRIVATE BY DESIGN
No account. No cloud sync. Your jobs and numbers stay on your device; purchases go through Apple. Pro users can export everything to CSV.
Free: the full calculator, slicer import, quote cards and 3 saved jobs. Spoolworth Pro is a one-time purchase. Pay once, keep it forever.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Every animation now respects Reduce Motion.
Fewer repeated explanations in Settings and on the Spools list.
The developer, Tom Nguyen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tom Nguyen
- Size
- 9 MB
- Category
- Business
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Spoolworth Pro — Lifetime $9.99
- Copyright
- © 2026 Tom Nguyen
