What you are buying

A licence to use the Sparks study companion on the number of devices your plan lists, for the period you paid for. The free toolkit is not part of the licence: it keeps working whatever happens to your licence, permanently and offline.

What we keep about your devices

When you activate, your device generates a pair of keys and sends us the public halves. We keep:

those public keys, and a hash of one of them, so a licence can be tied to a device;
a label you can recognise, such as “iOS · 2026-08-29”;
when the device last checked in, and the app version it was running.

We do not fingerprint your browser, and we do not track how you use the app. The private half of your device key never leaves your device. It is generated so that it cannot be exported, including by us.

Sharing

Your licence covers your own devices, up to the number your plan lists. You can release a device from Settings and activate another in its place, as often as you need.

Passing your key to people who have not bought one ends the licence, without a refund. If several apprentices need it, the Workshop plan exists for that and is cheaper than one licence each.

Refunds

Fourteen days, no questions, for any reason. Ask and we will refund it. Your devices stop opening the paid content within 37 days of the refund, as their licences and the grace period after them run out.

Relying on it

Sparks is a study aid. Check every calculation and every table against the current edition of I.S. 10101 before you rely on it in real work, follow your training provider, and work under your supervisor. The app is there to help you learn the reasoning and to save you looking up a figure on site; the standard is the standard.