​
What’s new

You can now generate a seamless off-app purchase link that lets customers buy without being routed through in-app purchase systems. You own the transaction end-to-end.

​
Why it matters

A recent court decision cleared the way for developers to sell off-app without being locked into Apple’s payment system. This update puts that power in your hands — letting you keep more revenue, stay in control of pricing, and deliver the same friction-free checkout you expect from Supertab.

​
How it works

1. Generate a Purchase Link
Append your client_id (live or test) and offering_id to Supertab’s purchase endpoint: 
https://purchase.supertab.co/?client_id=client.your_client&offering_id=offering.your_offering
Users can click or be redirected to this link for a quick checkout. 2. Add Optional Metadata
Pass extra context — like user_id, nonce, or timestamp — encoded into the URL. It returns with the purchase object, making attribution and validation simple. 
const metadata = { user_id: "123", nonce: "456", timestamp: Date.now() };
const encoded = encodeURIComponent(new URLSearchParams(metadata).toString());
const url = `https://purchase.supertab.co/?client_id=...&offering_id=...&metadata=${encoded}`;
3. Handle the Redirect
After purchase, users are sent back to your site or app with:
  • purchase_id — Supertab’s transaction ID
  • status — completed or abandoned
  • offering_id — your product ID
  • metadata — any custom data you passed in

​
Your Next Steps

  • Set up or reuse your Supertab site for landing and redirect handling.
  • Enable one or more offerings for off-app availability.
  • Generate links and place them in your app or site flows.
  • Test the redirect and metadata flow end-to-end.
Want more details? Check our docs for integration examples or Contact us to learn more or request new features.