Ireland I.S. 10101
The calculations you need on site, ready before the signal is.
Sparks is a pocket toolkit and exam companion for apprentice electricians. Calculators that show their working, a safe isolation checklist you can actually follow on a job, and practice questions that explain why the answer is the answer.
Open Sparks, freeSee what a licence adds
Straight in, free: add it to your home screen and it works like an app.
9.00V
3.91% of 230V, within the 5% limit
This is the tool itself, not a picture of it. The same arithmetic runs in the app.
On the phone
Six tools, one tap from the first screen



Free and licensed
What your licence adds
| Feature | Free | Licensed |
|---|---|---|
| Voltage drop, Ohm’s law, cable colours | Included | Included |
| Max Zs and cable sizing tables | Included | Included |
| Safe isolation checklist, with a timestamp | Included | Included |
| Test sequence, dead tests before live | Included | Included |
| Five sample questions | Included | Included |
| The full question bank, every phase | Not included | Included |
| A teaching explanation on every answer | Not included | Included |
| New questions delivered to the app | Not included | Included |
How your licence works
It works wherever you do
01
Enter your key once
Anywhere you have a connection. That is the only moment Sparks needs one.
02
Then a month at a time, offline
Your licence lives on the phone, as a signed token it already holds. Open the app and you are straight in, on any job.
03
It renews itself
Next time you have signal it renews in the background, while you carry on working.
Any connection will do for that one moment: the wifi at home, a hotspot, a colleague's phone. That single moment covers a month of work, anywhere.