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index9

Terms of sale and use

Last updated August 16, 2026

These terms cover browsing index9.dev and buying a one-time Pro unlock for Windrose or Whetstone.

Who is selling

Index9 is a small Mac software studio operating index9.dev. Windrose and Whetstone are Index9's products.

What you're buying

Each product page states what Pro adds and its current price. Pro is a one-time purchase, not a subscription. There is no activation limit: a Pro key works on every Mac you use it on.

Paddle is the seller of record

Checkout is run by Paddle.com, Index9's authorized reseller and the Merchant of Record for every purchase. Paddle charges the card, issues the receipt, remits applicable tax, and handles payment disputes. Completing checkout also means accepting Paddle's Buyer Terms, shown again at the point of payment.

Trials

Each app includes a full-Pro trial described on its product page, starting the first time the app is opened on a Mac.

Ownership

Index9 owns index9.dev's content and each app's software, design, and copy, except where an app's own materials note a separate license.

Refunds

See the Refund Policy.

Changes

These terms can change. The date above marks the latest revision. Continuing to use the site after a change means accepting it.

Governing law

These terms are governed by the laws of British Columbia, Canada.