Managing Your Subscription
Managing Your Subscription
Manage your subscription, billing, and payment methods from the Settings page.
Plans
| Feature | Free | Pro ($19/mo) | Enterprise |
|---|---|---|---|
| All calculators | ✅ | ✅ | ✅ |
| AI interpretations | 5/day | Unlimited | Unlimited |
| Calculation history | 7 days | Unlimited | Unlimited |
| PDF/CSV export | ✅ | ✅ | ✅ |
| API access | ❌ | 1,000 calls/mo | Custom |
| Team features | ❌ | ❌ | ✅ |
| Priority support | ❌ | ✅ | ✅ |
Annual billing saves 20%. Switch to annual in Settings → Billing.
Upgrading
Go to Billing
Navigate to Settings → Billing.
Choose a Plan
Click Upgrade to Pro and review the features.
Enter Payment
Complete the Stripe secure checkout. We accept Visa, Mastercard, and American Express.
Start Using Pro
Your plan activates immediately — no waiting, no restart required.
Downgrading
Go to Billing
Navigate to Settings → Billing.
Change Plan
Click Change Plan and select the Free tier.
Confirm
The change takes effect at the end of your current billing period. Your data is retained for 30 days.
After downgrading, calculation history beyond 7 days is archived. Resubscribe within 30 days to recover it.
Cancellation
After cancellation, you keep access until the end of your paid period. Your account then reverts to Free. Archived history is permanently deleted after 30 days.
Payment & Invoices
- Visa, Mastercard, American Express
- ACH bank transfer (Enterprise only)
All payments processed securely through Stripe. We never store your card details.
Download invoices from Settings → Billing. Each includes:
- Invoice number
- Plan details and amount
- Payment date
- Tax information (if applicable)
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