Refunds & cancellations

Effective 11 November 2026 · Harmonious is operated as a sole proprietorship under the Harmonious trade name.

Short version. Harmonious is a hosted subscription billed by Paddle. Cancel any time from Settings; access continues to the end of the paid billing period. Nothing here limits rights you have under mandatory consumer law.

Hosted subscriptions

Hosted plans are $10 per month or $80 per year, billed by Paddle as merchant of record. Paddle handles payment, applicable tax and invoices. You can cancel any time from Settings → Subscription → Manage billing. Cancellation stops future renewals; access continues until the end of the billing period you already paid for.

If you were charged in error, charged after cancelling, or did not receive the service, contact support@harmonious.science with the Paddle invoice or transaction number. Refunds are issued through Paddle to the original payment method where approved. Statutory withdrawal or consumer rights that apply in your country are not affected.

Failed payments

Paddle may retry a failed payment. If a payment remains unpaid, hosted access may be suspended until it is resolved. Update the payment method from Manage billing or contact support if the subscription is still marked past due after a successful payment.

Contact

Email support@harmonious.science. Include your account username and, for billing, the Paddle invoice or transaction number. See also the terms of service and privacy policy.