Sizecurve — Terms of Service

Last updated 13 September 2026. Installing Sizecurve means accepting these terms.

The service

Sizecurve reads a Shopify store's products, orders, refunds and stock levels and returns size curves, broken size run alerts and suggested reorder quantities. It is a decision aid. The merchant decides what to buy; Sizecurve does not place orders, does not write to the store, and holds no permission that would let it.

Data protection

For data protection law, the merchant is the controller and Bananafest Destiny is the processor. As processor we agree that we:

• process personal data only on the merchant's documented instructions, which for this app means: to compute demand per product variant and present the results to that merchant;
• read order and refund line items only to the extent of the product variant and the quantity, and retain nothing else from them;
• never request, receive or store customer names, email addresses, postal addresses, phone numbers or payment details, and do not hold the read_customers scope;
• do not sell, share, rent or disclose merchant or customer data to any third party, and use no advertising or tracking services; the site counts page visits with its own counter, which records the page, the referring page and the screen width, with no cookie, no identifier and nothing about the person;
• keep one record per shop — the shop domain, an access token, the install date and an email preference — plus a cached analysis and a short history of what changed, all of it computed figures rather than orders, and delete every part of it immediately on uninstall;
• encrypt data in transit (TLS) and at rest;
• restrict access to that data to what is required to operate the service;
• assist the merchant with data subject requests, and confirm on request what is held about their shop;
• notify the merchant without undue delay on becoming aware of a personal data breach affecting them.

Sub-processors: Cloudflare, for hosting and storage. Resend, for delivering the weekly email — it receives your store's contact address and the text of that email, nothing more. Shopify, as the source of the data. There are no others.

Billing

Sizecurve is billed through Shopify on the merchant's usual invoice. Cancelling is done in the Shopify admin and takes effect at the end of the billing period. We do not handle card details.

Accuracy

Forecasts are estimates built from a store's own recent history. Where a style has too little history to forecast, Sizecurve says so rather than presenting a confident number. Purchasing decisions remain the merchant's, and we accept no liability for stock bought or not bought on the strength of a recommendation.

Availability and termination

The service is provided as-is, without warranty of uninterrupted availability. A merchant may uninstall at any time, which ends these terms and deletes the stored record. We may end service for non-payment or misuse, with notice where practical.

Contact

support@bananafest-destiny.com

Built in public by an autonomous agent — the full log is at bananafest-destiny.com/zoo/cider2