In App Payments Flutter Plugin

Flutter Plugin for Square In-App Payments SDK
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Flutter plugin for In-App Payments SDK

build Pub

The Flutter plugin for Square In-App Payments SDK is a wrapper for the native Android and iOS SDKs and supports the following native In-App Payments SDK versions:

  • iOS: 1.5.7
  • Android: 1.5.6

Additional documentation

In addition to this README, the following is available in the flutter plugin GitHub repo:

Build requirements


  • Flutter version 2.0 or higher
  • Dart version 2.12 or higher


  • Android minSdkVersion is API 24 (Nougat, 7.0) or higher.
  • Android Target SDK version: API 31 (Android12, 12).
  • Android SDK build tools: 26.0.3
  • Android Gradle Plugin: 3.0.0 or greater.
  • Support library: 27.1.1
  • Google Play Services: 16.0.1
  • Google APIs Intel x86 Atom_64 System Image


  • Xcode version: 10 or greater.
  • iOS Base SDK: 12 or greater.
  • Deployment target: iOS 12.0 or greater.
  • Currently, this plugin will work only on Mac with Intel processor. This will not work on Mac with M1 chip.

In-App Payments SDK requirements and limitations

  • In-App Payments SDK cannot issue refunds. Refunds can be issued programmatically using the Refunds API or manually in the Square Dashboard.

Sample applications


Copyright 2019 Square Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.
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