own product · 02 · ios

stocksmith.

cost price calculation on your iphone or ipad. from raw material to marketplace listing — no spreadsheet needed. works offline; syncs when you're back on wifi.

q2 2026. app store release
ios. iphone and ipad. android coming later.
€5.99 per year

it's not the spreadsheet.
it's not gut feeling.
it's knowing what something actually costs.

the problem

makers of 3D-printed products guess their cost price. material costs, print time, failed prints — scattered across notes, sheets, and memory. then something goes wrong, and the margin does not add up.

the symptom

"i thought i was making money on that." "that filament cost more than i figured." a product on etsy priced too low — sold a hundred times over.

what stocksmith does

log your materials and costs. link them to a product. stocksmith calculates the cost price — and exports your listing directly to etsy, shopify, or bol.

four modules

material. cost price.
forge. listing.

four things, no more. a tool that does too much gets used by no one — a maker in the workshop doesn't need an erp.

01 · module

materials

enter what you use: filament, resin, consumables. weight, price per kg, residual value. stocksmith remembers it — and calculates with it.

  • · automatic price per gram
  • · multiple materials per product
  • · stock overview
02 · module

cost price

link materials and print time to a product. the cost price comes out — including waste, overhead, and margin. no more guesswork.

  • · automatic calculation
  • · adjustable margins
  • · updates with every price change
03 · module

forge

production management for the workshop. what's running, what's done, what's next. one overview — no loose notes.

  • · orders and production status
  • · linked to cost price
  • · completion status per batch
04 · module

marketplace

done? go live. stocksmith exports your product — price, description, and stock — to etsy, shopify, or bol.

  • · direct integration
  • · price based on calculated cost
  • · multiple channels at once
who it's for

four kinds of makers
where this fits.

hobbyist going pro

first real orders, no idea what to charge. stocksmith puts you on solid ground.

established etsy seller

dozens of products, manual pricing. one material price change now updates everything.

small-batch producer

running batches, tracking orders, watching margins. forge keeps the overview.

multi-channel seller

same product on etsy and bol. enter once, everywhere up to date.

niet voor: large manufacturers, injection moulding operations, or businesses with an existing erp — stocksmith is for the maker still running on gut feeling and spreadsheets.
now available

now in the app store.

stocksmith forge is available on the app store — download it on your iphone or ipad.

faq

about stocksmith.

question not in the list? mail me at hello@whappa.com.

01 which nfc stickers can i use to label my spools? +
three types that work well:

ntag213 — the standard. 144 bytes of memory, cheap, perfect for storing a url or simple command.
ntag215 — most memory for typical use. 504 bytes, fully supported on iphone.
ntag216 — the most storage of the three (888 bytes). useful if you need to write large amounts of data to the tag.

ntag213 is the smartest choice for almost everyone.
02 can an ipad read nfc tags? +
no. apple has restricted nfc reading to iphone. ipad has no nfc chip.
03 can i buy stocksmith once instead of subscribing? +
yes — there are two one-time in-app purchases: stocksmith pro gives lifetime access to all features, and lifetime nfc unlocks the nfc functionality permanently. both are optional alongside the subscription.
04 what can i do with the free version? +
everything — but with limits: a maximum of 25 materials, 15 spools, 10 products, and 10 listings. enough to get started and see if stocksmith fits your workflow. for serious use you will want pro.
05 can i share my data across devices? +
yes — stocksmith uses cloudkit to store your data. everything syncs automatically across all your apple devices via your own icloud account.
06 how many languages does the app support? +
five. stocksmith is fully translated into dutch, english, german, french, and spanish — so you can manage your materials in your own language, wherever you work.
something like stocksmith?

tell me what's next.