diff --git a/app/src/main/java/com/example/citrusclient/models/Todo.java b/app/src/main/java/com/example/citrusclient/models/Todo.java
index 10a9733..8458c6b 100644
--- a/app/src/main/java/com/example/citrusclient/models/Todo.java
+++ b/app/src/main/java/com/example/citrusclient/models/Todo.java
@@ -1,5 +1,7 @@
 package com.example.citrusclient.models;
 
+import java.util.List;
+
 public class Todo {
 
     String title;
@@ -50,5 +52,12 @@
     }
     public Integer getBookId(){return bookId;}
 
-
+    public boolean containsTodo(List<Todo> todoList){
+        for(Todo todo : todoList) {
+            if(todo.bookId == this.bookId && todo.year == this.year && todo.month == this.month && todo.day == this.day && todo.todoId == this.todoId) {
+                return true;
+            }
+        }
+        return false;
+    }
 }