diff --git a/lib/UpiPayment.js b/lib/UpiPayment.js
index eb8b350..792d9d7 100644
--- a/lib/UpiPayment.js
+++ b/lib/UpiPayment.js
@@ -2,6 +2,13 @@ import { NativeModules } from 'react-native';
 
 const UpiModule = NativeModules.UpiPayment;
 
+function isNull(data) {
+  if (data === '' || data === 'null' || data === null || data === undefined) {
+    return true;
+  } else {
+    false;
+  }
+}
 
 const RNUpiPayment = {
   requiredFields: [
@@ -80,7 +87,7 @@ const RNUpiPayment = {
     return object;
   },
 
-  initializePayment(config, success, failure) {
+  initializePayment(config, success, failure, payApp) {
     if (typeof success !== 'function') {
       throw new Error('Success callback not a function');
     }
@@ -112,9 +119,10 @@ const RNUpiPayment = {
       return accumulator;
     }, '');
     const upiConfig = {}
-    upiConfig.upiString = `upi://pay?${queryString}`;
+    const app  = isNull(payApp) ? "" : (payApp + "://");
+    upiConfig.upiString = app +`upi://pay?${queryString}`;
     UpiModule.intializePayment(upiConfig, this.successCallback(success), this.failureCallback(failure));
   }
 }
 
-module.exports = RNUpiPayment;
\ No newline at end of file
+module.exports = RNUpiPayment;