When you add Zyro on Shopify, it asks for 3 permissions. They let it read orders and see what shoppers do on your store. The third lets it add its tracking code.
Zyro asks for more inside the app, only when you use a feature that needs it.
Zyro does not ask Shopify for shoppers' names, emails or addresses on orders.
Card details never reach Zyro. Stripe or Shopify handles payment.
What Zyro can change
Zyro only changes a product when you keep a winning test or save a customs code. You can undo both.