The Android source candidate adds Open invoice & secure payment inside invoice details, and All tools → Secure invoices & payments. These open the responsive Logistics web invoice/payment flow in an in-app browser. Sign in with the same Printuvi account if prompted; the browser login is separate from the native session. The server still checks invoice ownership, payable status and Stripe configuration. This is a web checkout reached from the app, not a newly implemented native card-entry form, and it requires device and Stripe test-mode verification before release.