Every plan uses the same deterministic solver, rule-derived steps and result checks. Paid plans extend your daily allowance with account credits.
Best for occasional checks
For trying the solver and everyday practice.
$0/ forever
Calculation allowance
20 calculations each day
No payment or account required
Best for ongoing study
65% lower cost / creditOngoing practice with a larger monthly allowance.
$9.99/ month
Calculation allowance
2,000 calculation credits
$0.005 / credit
Renews monthly · Cancel from billing
Best for a focused week
One-time purchaseA stackable credit pack for revision week. Buy it again whenever you need more.
$4.99/ 7 days
Calculation allowance
350 calculation credits
$0.014 / credit
No subscription · No automatic renewal
At-a-glance comparison
Every plan keeps the same solver quality. The difference is allowance, validity and billing.
| What changes | CalculusMate Pro | Exam Pass | Free |
|---|---|---|---|
| Allowance | 2,000 credits per billing period | 350 credits per purchase | 20 calculations per day |
| Validity | Each monthly billing period | 7 days from each payment | Daily free allowance |
| Billing | Monthly automatic renewal | One-time, no renewal | Free |
| Best for | Regular coursework and practice | Short, intensive revision | Light everyday use |
Usage estimator
This estimate subtracts the 20 free daily calculations from your planned use. It runs only in your browser and never spends credits.
Estimated extra credits
433
Beyond the daily free allowance
Suggested fit
CalculusMate Pro
Your ongoing use benefits from the larger monthly allowance and lower unit cost.
The price and plan details shown here are the same details you review before payment.
Credits are added only after the payment provider confirms payment.
Exam Pass does not renew. Pro renews monthly and can be cancelled from billing.
The price shown here matches checkout. Credits appear after payment confirmation; if they do not, check Billing or contact support.
Allowance rules
The free daily allowance is used first. Account credits are considered only after that allowance is exhausted.
After the free daily allowance is exhausted, one account credit is used only when a supported calculation completes with a result.
Invalid input, unsupported work and requests that do not complete do not consume a credit. Retrying the same operation does not create a second charge.
Each Exam Pass grant expires seven days after its own payment time and does not renew. Pro renews monthly; cancellation takes effect at the end of the paid period.
A failed task that was charged is restored automatically. Approved payment refunds or disputes can remove unused credits linked to that purchase.
For a billing review, use contact support and review the terms of service
