diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..8b57af2 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,21 @@
 export function mostUsedChar(text) {
-    // implementar logica aqui
-    return ""
-}
\ No newline at end of file
+  // implementar logica aqui
+  const stringToArray = text.split('')
+  const obj = {}
+
+  stringToArray.forEach(element => {
+    obj[element] = obj[element] ? obj[element] + 1 : 1
+  })
+
+  const objToArray = Object.entries(obj)
+
+  let res = ['', 0]
+
+  objToArray.forEach(word => {
+    if (res[1] < word[1]) {
+      res = word
+    }
+  })
+
+  return res[0]
+}