Square Developer

Easily integrate payments into your Flutter apps.

At the Flutter Live event in London, we announced 2 new Flutter plugins. These plugins enable the quick and easy integration of payments into Flutter apps. With billions of transactions processed, we have built strong payments expertise that Flutter developers can now rely on to build great apps.

Flutter plugin for Reader SDK

Square Reader SDK* enables developers to build apps that take in-person payments with Square hardware. With the Reader SDK, you can build a custom point of sale, self-service kiosk or any other in-person payment solution.

Flutter plugin for In-App Payments SDK

Square In-App Payments SDK enables developers to take payments in a mobile app. Our interactive UX was designed for fast and accurate card entry in mobile apps and it is fully customizable so that it can match your app.


Square Developer Platform

*Reader SDK is only available for accounts based in the United States