Kwiziq offers both free and Premium accounts. The free account is based on a test credit system.
How Free Account Credits Work
You can get up to 120 credits per year on the free account, but only if you use all 10 each month.
Every month, on the first of the month, your free account credits are topped up to 10 credits. If you haven't used your credits from the previous month, they expire: they do not carry forward if you don't use them.
We want you to get the most out of your free account, so we send emails towards the end of the month to remind you to use any remaining credits.
All Premium accounts have unlimited test credits, so you can test as much as you like all month. The only difference between the Premium packages is the length of the payment term. The longer the payment period, the better the price per month.
You can cancel any time, but the current term will run to its end. So if you pay monthly, you're committing to at least one month, if you pay quarterly, then it's three months, etc.
At the end of the payment cycle, you'll drop back to the free account so you can continue to use the product on the free credits system.
"Students taking regular low-stakes tests (quizzes)
performed up to 25% better in their exams"
- "McDaniel, Mark A et al. Journal of Educational Psychology 103.2 (2011): 399."