FlutterFlow + Stripe Integration Guide
Accepting payments in a FlutterFlow app requires integrating Stripe — either through a backend API or FlutterFlow's custom code widget. Because mobile apps present unique security challenges (no server-side rendering, shared devices), the architecture matters: Stripe payment intents must be created server-side before being presented in the mobile UI.
Why FlutterFlow + Stripe?
Stripe is the most complete mobile payment solution: it handles card processing, Apple Pay, Google Pay, subscriptions, and the 3D Secure authentication required in Europe. FlutterFlow apps use the Stripe Flutter SDK (injected as a custom package) to render Stripe's native payment sheet — a fully PCI-compliant payment UI that handles every card type and local payment method without any custom form building.
Setting up the integration
Add the flutter_stripe package to FlutterFlow's custom packages. Create a backend function (Firebase Cloud Function, Supabase edge function, or Xano endpoint) that creates a Stripe PaymentIntent and returns the client_secret. In FlutterFlow, create an API call action that hits your backend, then use a custom action to call Stripe.instance.initPaymentSheet() with the returned secret, followed by Stripe.instance.presentPaymentSheet() to show the native payment UI. On completion, update the user's order status in your database.
Subscriptions in mobile apps
For subscriptions in mobile apps, consider using RevenueCat instead of (or alongside) Stripe — Apple and Google require in-app purchases for subscription products distributed through the App Store and Play Store. Stripe works well for web-initiated subscriptions, but in-app subscriptions to content or services sold through the app stores must go through StoreKit and Play Billing. Consult App Store Review Guidelines Section 3.1.1 before choosing your payment architecture.
Real-world use cases
FlutterFlow + Stripe is used for: marketplace apps where buyers pay sellers, on-demand service apps with one-time charges, membership apps where subscriptions are managed outside the app stores, B2B mobile tools that bill per seat, and donation apps. App Studio always sets up Stripe in test mode first, uses Stripe's test cards for every payment flow, and builds webhook handling before launch.
Common pitfalls
Never create PaymentIntents from the FlutterFlow app itself — always go through a backend. A user who intercepts their own network traffic could alter the amount. Stripe webhook delivery can fail — implement idempotent handlers that check if an order is already fulfilled before processing again. Test on real iOS and Android devices; the Stripe payment sheet behaves differently across platforms. Check App Store and Play Store policies before using Stripe for in-app subscriptions.
What you can build
- Marketplace payments
- On-demand services
- B2B mobile billing
- Donations
- Membership apps
Ready to build with FlutterFlow + Stripe?
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