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Full Stack Mobile App Development · Module 8 of 10

Payments and integrations

Monetise and connect third-party services.

📖 Key ideas

  1. Payment gateways: Razorpay, Stripe, PayU; UPI intents.
  2. Verify payments on the server, never trust the client alone.
  3. In-app purchases must use Google Play Billing / Apple IAP for digital goods.
  4. Maps, analytics and crash reporting SDKs.
  5. Respect privacy policies and data safety forms.
💡 Real-life example: Payment verification is the cashier checking the note under UV light, not trusting the customer's word.
Payment gatewayProcesses online payments
Server-side verificationConfirming payment on the backend
In-app purchaseStore billing for digital goods
SDKSoftware development kit