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Custom Currency for WooCommerce allows you to change the currency symbol used in WooCommerce and you can add a new custom currency type to the WooCommerce.
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Custom Currency for WooCommerce

Custom Currency for WooCommerce allows you to change the currency symbol used in WooCommerce.

Niloy - Codeixer

pkolomeitsev

Exchange Rates for WooCommerce – Mudra – is a simple plugin, which allows you to change product price according currency exchange rate. 
Default currency must have exchange rate equals 1. All other currencies rates should be set according exchange rate to default one. 
End-user can buy products from your WooCommerce store using different currencies.
All currencies info are based on WooCommerce plugin data.
Features:
<ul>
<li>Setup currency exchange rates from control panel</li>
<li>Display currency switcher to end user</li>
<li>Store order with selected currency</li>
</ul>

Multi Currency, Currency Switcher, Exchange Rates for WooCommerce – Mudra

Allows to add exchange rates for WooCommerce store

Custom Currency for WooCommerce vs Multi Currency, Currency Switcher, Exchange Rates for WooCommerce – Mudra