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Dev Essentials
PaymentsCommerceCustomersStaffMerchants
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Docs

Docs Home
Dev Essentials
Payments
Commerce
Customers
Staff
Merchants
Publish
Release notes
Overview
Build a Tip Report
Split an Online Payment
Build a Sales Report
Delayed Capture
Partial Payments
Statement Descriptions
ACH Bank Transfer Payment
Afterpay and Clearpay Payments
Cash App Payments
Cash Payments
External Payments
House Accounts
Collect Application Fees
Update Payment and Tip Amounts
Retrieve Payments
Troubleshoot
Webhooks
Refund Payments
Refund a Payment with an App Fee
Retrieve Refunds
Process an Unlinked Refund
Webhooks
Process Disputes
Test in the Sandbox
Take Payments on Hardware
Quickstart
Take Payments
POS App Pairing with Square Terminal
Dismiss Terminal Checkouts and Refunds
Monitor Square Terminals
Manage Terminal Actions
Save Card on File
Check Device Information
Print or Issue Receipts
Customize the Idle Screen
Confirmation Screen
Signature Capture Screen
Data Collection Screen
Menu Selection List Screen
QR Code Screen
Link and Dismiss Actions
Refund Interac Payments
Take E-Money Payments
Take QR Code Payments for Digital Wallets
Authorize the Mobile Payments SDK
Pair and Manage Card Readers
Take a Payment
Offline Payments
Handling Errors
Authorize the Mobile Payments SDK
Pair and Manage Card Readers
Take a Payment
Offline Payments
Configure for Square Stand or Square Kiosk
Handling Errors
Migrate from Reader SDK
Reader SDK
Get Credentials
Configure the Sample Application
Take a Cash Payment
Customize the Checkout Amount
Take a Credit Card Payment
How It Works
Build on Android
Build on iOS
Connect a Contactless Reader
Charge a Card on File
Save a Card on File
Configure on iOS for Square Stand
Deauthorize Reader SDK
Capture a Transaction
Delay the Capture of Payments
Configure APK Splits
Update to New Reader SDK Version
Flutter Plugin
React Native Plugin
How It Works
Build on Android
Build on iOS
Build on Mobile Web
Find Your Android Fingerprint
Use the API in Offline Mode
Add an Alert Dialog Helper Class
Accept E-Money Payments
Accept PayPay Payments
Mobile Web Technical Reference
Payments API Integration
Clone the Quickstart Project Template
Add the SDK to the Web Client
Verify the Payment
Add Strong Customer Authentication
Deploy the Application
Take a Card Payment
Apple Pay
Google Pay
Digital Wallet Payment Requests
ACH Bank Transfer
Afterpay
Cash App Pay
Take a Gift Card Payment
Take Partial Payments
Customize the Card Entry Form
Add SCA to a Card Payment
Store a Card on File
Charge a Card on File
Charge and Store a Card on File
Set up the Client
Deploy the Server
Install the SDK
Build on Android
Build on iOS
Google Pay
Apple Pay
Enable SRC for Android
Enable SRC for iOS
Localize an Application
Gift Card Payments
Flutter Plugin
React Native Plugin
Customize the Payment Entry Form
Connect to a Backend Service
Remove the Postal Code Requirement
Troubleshoot
How It Works
Verify a Buyer
Quick Pay Checkout
Square Order Checkout
Subscription Plan Checkout
Checkout Settings
Checkout Configurations
Manage Checkout
Guidelines and Limitations
Subscription Plans and Variations
Manage Subscriptions
Subscription Actions and Events
Pause, Resume, or Cancel Subscriptions
Subscription Billing and Invoices
Swap Subscription Plan Variations
Create and Publish Invoices
Retrieve, List, or Search Invoices
Create or Delete Invoice Attachments
Update Invoices
Cancel or Delete Invoices
Pay or Refund Invoices
Walkthrough: Create and Publish Invoices
Manage Cards
Create a Card on File from Payment ID
Create a Card on File and Make a Payment
Create a Shared Card on File and Make a Payment
List Payouts
Get Payout
List Payout Entries
Bank Accounts
How It Works
Build with Mobile Authorization
Get Authorization Code on Command Line
Payment Methods by Country
Payments Pricing
Strong Customer Authentication
Payment Minimums

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Payments

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Take Payments on Hardware

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Reader SDK

Flutter Plugin

Applies to: Reader SDK - Android | Reader SDK - iOS

Use Flutter to create applications that take payments on iOS and Android.

Important

The Mobile Payments SDK has launched as the successor of the Reader SDK. To take in-person payments on Square hardware, you should migrate from the Reader SDK to the Mobile Payments SDK.

Overview
Link to section

Overview

The Flutter plugin for the Reader SDK is an open source project that provides a Dart interface for calling the native Reader SDK implementations.

For more information, see the Get Started, quickstart sample application, and technical reference in the Reader SDK Flutter repo on GitHub.

Did you know?

If you don't have a Square Reader, you can purchase a Magstripe Reader online or buy a Square Reader online or in person.

Link to section

See also

On this page
OverviewSee also