Smart Cable Measuring
CABLE
MEASURING,
ACCURATE
AT LAST.
Spooler is a smart device for electricians. It measures and dispenses the exact length of cable right on the job site — no rewinding, no guessing, no wasted material.
Android app (beta) on Google Play· testers only, ask us for access
iPhone app (beta) via TestFlight· anyone can join, you just need the TestFlight app
±1.5 %
Measuring accuracy
100 m
Spool capacity
BT / Wi-Fi
Data transfer
iOS / Android
Mobile app
The problem
MEASURING CABLE BY HAND IS SLOW AND ERROR-PRONE
Every day, electricians lose time rewinding, estimating and logging material use by hand. The result is lost money — yours and your customers’.
Lost time
Measuring and recalculating by hand slows the work down and adds hours of unnecessary effort to every job.
Record-keeping errors
A bad estimate of material use leads to overpaying, or to underbilling the customer.
Complicated billing
Without accurate data on material use, billing a job is hard, inaccurate and time-consuming.
Why Spooler
EVERYTHING
YOU NEED
ON SITE
Spooler was designed by electricians for electricians. Every feature solves a real problem from the field.
Automatic tracking
Spooler automatically tracks stock and consumption history. You always know how much cable is left on the spool.
±1.5 %
MEASURING ACCURACY
Mobile app
Consumption at a glance on your phone (iOS & Android). Export data for easy billing in just a few taps.
Rugged build
Dust-tight and impact-resistant, built to survive any job site. Certified up to 93 °C.
USB-C charging
22650 Li-ion battery (5000 mAh) charged over USB-C — always ready to work.
Packout compatible
Directly compatible with the Milwaukee Packout system — it fits right into the setup you already have.
±1.5 % accuracy
The AS5600 magnetic sensor delivers accurate measurement. No rewinding, no guesswork.
The device
SPOOLER 2.0
- Cable cross-sections 0.35–6 mm²
- Holds up to 100 m of 1.5 mm² cable
- Magnetic sensor, ±1.5 % accuracy
- Bluetooth / Wi-Fi → iOS & Android
- 22650 Li-ion, 5000 mAh, USB-C charging
- Dust-tight, impact-resistant, up to 93 °C
- Compatible with Milwaukee Packout
Or print it at home
You can 3D-print Spooler on your own printer. The models and the build guide are in our portal.
Build your own →Questions, or ordering for a company? Write to us
DIY
BUILD YOUR
OWN SPOOLER
Spooler is not a black box. Print it on your own 3D printer from the detailed guide in our portal — with electronics, or as a purely mechanical version.
01
Print
STL models of every part, recommended print settings and ready-made spool sides.
02
Get the parts
Complete bill of materials and wiring of the electronics — all commonly available.
03
Assemble and use
Step by step with assembly videos and notes from other builders.
Spooler Smart
With electronics: display, magnetic sensor and board. Measures the length and connects to the app.
Open the guideSpooler Lite
Without electronics: the purely mechanical version, the simplest and cheapest to build.
Open the guideThe guides and models are in the portal at portal.spooler.tools. If you would rather have a finished device, see the shop above.Portal with guides and models
Community
JOIN US
We build Spooler in the open — follow our progress, share your feedback and be the first to get a Spooler.
Discord
@spooler
Community, discussion, beta feedback and the latest news straight from the developers.
@spooleroller
News, photos from development, behind-the-scenes looks and first product previews.
@spooleroller
Behind the scenes of development — prototypes, manufacturing and the whole project.
Contact
LET'S
TALK
Interested in Spooler, want to become a beta tester, or have a question? Write to us — we will be happy to reply.
Snail Rollers s.r.o.
Kurzova 2222/16
155 00 Prague 13 – Stodůlky, Czech Republic
Company ID: 23380551 · Tax ID: CZ23380551