Refund & Subscription Policy

Last Updated: February 20, 2026

1. Subscription Plans

ERD Studio operates on a monthly subscription basis. Plan pricing is as follows:

Plan	Monthly Price	For
Free	$0 / mo	Personal / Learning
Pro	$15 / mo	Carrying the work on your own
Team	$49 / mo	Teams designing together
Enterprise	Contact us	Rollout at organisation scale

2. Automatic Renewal

Paid plans automatically renew on your monthly billing date.
Renewal payments are processed automatically through Polar.
To prevent renewal, you must cancel your subscription before the billing date.

3. Subscription Cancellation

You may cancel your subscription at any time.
Cancellation is not immediate — you retain access to paid features until the end of the current billing period.
After the period ends, your account automatically reverts to the Free plan.
No refund is issued for cancellation. (See the Refund Policy below if you wish to request a refund.)

4. Refund Policy

Refund requests are accepted within 3 days (72 hours) of payment.

Refund requests are only accepted within 72 hours of payment.
Refund amounts are calculated on a pro-rata basis, with a minimum of 1 day of usage deducted.
Upon refund completion, your account immediately reverts to the Free plan.
Refunds are not available after 72 hours. For exceptional circumstances, please contact us by email.

5. Refund Calculation

Refund amounts are calculated as follows:

Days Used = MAX(1, Refund Request Date − Payment Date)

Daily Rate = Payment Amount ÷ Actual Days in Billing Month

Refund Amount = Payment Amount − (Daily Rate × Days Used)

Example (Pro, $15, February billing)

• Payment: Feb 1 / Refund Request: Feb 4 (3 days used)

• Daily Rate: $15 ÷ 28 days = $0.54

• Refund Amount: $15 − ($0.54 × 3) = $13.39

• Same-day refund: MAX(1, 0) = 1 day deducted → $15 − $0.54 = $14.46 refunded

6. Plan Upgrade

When upgrading to a higher plan, your current plan is cancelled immediately.
The unused portion of your current plan is refunded on a pro-rata basis.
Your new plan starts immediately from today, with a new billing cycle starting today.
The expected refund amount is displayed before you confirm the upgrade.

7. Plan Downgrade

Downgrading to a lower plan does not take effect immediately.
You retain your current plan until the end of the billing period with no refund.
The new lower plan is automatically applied starting from your next renewal date.

8. Payment Failure

If a renewal payment fails, Polar will automatically retry the charge.
After final failure, your account status changes to "past due."
If the payment method is not updated, your account automatically reverts to the Free plan.

9. How to Request a Refund

To request a refund, please contact us at the following email address. Requests must be submitted within 72 hours of payment. Processing takes 3–5 business days.

support@makevox.com

Please include your payment date, plan name, and reason for refund to help us process your request faster.

10. Seller and Payment Processing (Merchant of Record)

Paid plans for ERD Studio are resold by Polar Software, Inc. as the Merchant of Record, and payments are processed by Polar.

Polar is the counterparty to the payment transaction, and charges may appear on your card statement under Polar's name.
Receipts and invoices are issued in Polar's name.
Refund requests are received through the contact channel in section 9 above; the actual processing and disbursement of approved refunds is carried out through Polar.