In-App P{payment,urchase}s
summary
Square’s In‑App Payments SDK lets mobile apps accept cards, Apple Pay and Google Pay with 2.9% + $0.30 per transaction instead of “one third” fees, returns a one-time-use nonce for server-side charging or to place a card on file, and supports iOS, Android, Flutter and React Native. It forbids in‑app purchases of purely digital goods or digital subscriptions — only physical goods and services, and physical subscriptions are allowed. The Reader SDK integrates Square hardware over Bluetooth for point‑of‑sale scenarios like self‑serve kiosks or in‑cab payments.
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