added square @eranishojha

en/MENU.md

@@ -56,6 +56,7 @@
 	* Operation
 		* [Custom Fields](app-manual/operation/custom-fields)
 	* Payment Method
+		* [Square](app-manual/payment-method/square)
 	* Payroll
 	* Point of Sale
 	* Time Tracking

en/app-manual/payment-method/square.md

@@ -0,0 +1,51 @@
+Square
+======
+
+> Secure payment processing for your invoices
+
+[Square](https://squareup.com/us/en) is a financial services, merchant services aggregator, and payment company used by 2 million businesses.
+
+This app allows your customers to pay their invoices online via Squareup.com, a secure and easy way to accept credit/debit cards online. We don't get any commission fees.
+
+It will also accurately import/sync any Square payment received from Reader, POS or another Square method out of Akaunting and convert them to invoices automatically. So you'll save the time spent on manual updates, CSV imports, etc. You can also sync the current ones manually.
+
+Accept every payment quickly, easily, and securely.
+
+## Installation
+
+For installing, please visit [https://akaunting.com/apps/square](https://akaunting.com/apps/square), then from your Akaunting dashboard and go to **Settings > Square** page.
+
+![Square Installation](_images/square-settings.png)
+
+## Setting
+
+From this page, you can update the required settings for your app.
+
+![Square Setting](_images/square-form.png)
+
+### General
+
+In General Box, you can enable and disable the sandbox (the sandbox is for testing the payment system).
+> In a live site, the sandbox option should be disabled.
+
+**Access Token** - You can get the Access token from [Square](https://squareup.com/us/en) Payment site, there are two types of access tokens: the first one is for production mode, and another one is for testing(sandbox) mode.
+
+If Sandbox is enabled, the app will use test access token else production access token.
+
+### Payment
+
+In this section, you can update payment mode visibility.
+
+**Display Name:** this name will be displayed to the customer when they select a payment method to pay an invoice.
+
+**Order:** You can choose the order of your payment method name in the customer payment method select dropdown.
+
+**Enabled:** You can enable/disable payment options from here.
+
+### Sync
+
+In this section, you can manage the sync functionality of the Square App. From here, you can manually sync your payments from Square to Akaunting invoices.
+
+## Need a custom functionality
+
+Need a custom functionality in [Akaunting](https://akaunting.com), or want to develop a new feature, feel free to email us on anish.ojha@provistechnologies.com.