Tools
Track 3D printer filament by the gram and see what every print really costs.
Most makers find out a spool is nearly empty halfway through a long print. And when a friend asks "how much for one of those?", the answer is a guess. The slicer already tells you how many grams a model needs; Spoolrow turns that number into stock levels and real costs, so you know what you have and what to charge.
Four numbers at the top: filament on hand in kilograms, spools in use, spools running low and what you spent on prints this month. Below is every spool with a ring showing how much is left, in its own colour. Filter by low, empty or material (PLA, PETG, ABS, ASA, TPU, Nylon, PC), search by name, brand or location such as "AMS 1" or "dry box", and sort by what is about to run out.
Name, brand, material, colour, diameter (1.75 or 2.85 mm), net weight, the price you paid and where it lives. Spoolrow shows the price per kilogram, and once you have printed with a spool it estimates how many more prints are left at your average use.
After a print, tap Log print, type the grams from your slicer and the print time. Multi-colour print? Add up to four spools to one print. Spoolrow subtracts the grams from each spool and saves the cost: filament at the price you paid, electricity from your printer's watts and your price per kWh, and machine wear per hour for nozzles, belts and build plates. Mark a print as failed so wasted filament still counts. Enter a quantity and see the cost of each part.
Change a print later and Spoolrow first returns the old grams, then deducts the new ones. Delete a print and its filament goes back to the spools; tap Undo if you change your mind. Print again copies the spools, grams and time for the next batch.
Slicer estimates drift. Put the spool on a kitchen scale, tap Weigh and enter the reading; Spoolrow subtracts the empty spool weight and corrects what is left. Opened another spool of the same filament? Tap New spool to reset it to full. Each spool keeps a history of prints, weigh-ins and refills.
Spoolrow is a filament inventory and print cost tracker for people who own a 3D printer. Keep every spool on one shelf, log what you print, and Spoolrow deducts the grams and works out what each print cost you: filament, electricity and machine wear. No account, no subscription, no ads.
WHY SPOOLROW Most makers find out a spool is nearly empty halfway through a long print. And when a friend asks "how much for one of those?", the answer is a guess. The slicer already tells you how many grams a model needs; Spoolrow turns that number into stock levels and real costs, so you know what you have and what to charge.
THE FILAMENT SHELF Four numbers at the top: filament on hand in kilograms, spools in use, spools running low and what you spent on prints this month. Below is every spool with a ring showing how much is left, in its own colour. Filter by low, empty or material (PLA, PETG, ABS, ASA, TPU, Nylon, PC), search by name, brand or location such as "AMS 1" or "dry box", and sort by what is about to run out.
ADD A SPOOL IN SECONDS Name, brand, material, colour, diameter (1.75 or 2.85 mm), net weight, the price you paid and where it lives. Spoolrow shows the price per kilogram, and once you have printed with a spool it estimates how many more prints are left at your average use.
No. Your spools and prints stay on this phone. There is no sign-in and no cloud sync.
Up to 15 of your own spools, plus the samples. The print log, cost per print, quote calculator and CSV export are free. A one-time purchase removes the spool limit.
When you log a print, the grams you enter are taken off each spool you used. You can also put a spool on a kitchen scale and type the reading; Spoolrow subtracts the empty spool weight. It does not connect to printers or scales.
It is an estimate from your own numbers: filament, electricity, machine wear, labour, a failure allowance, markup and marketplace fee. It is not financial or tax advice.
No. The app has no ads and no analytics SDKs.
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