diff --git a/src/main/java/com/example/demo/controller/ToDoController.java b/src/main/java/com/example/demo/controller/ToDoController.java
index a1c576d..0ddee53 100644
--- a/src/main/java/com/example/demo/controller/ToDoController.java
+++ b/src/main/java/com/example/demo/controller/ToDoController.java
@@ -27,7 +27,13 @@ public String handleException(Exception ex) {
 	
 	@GetMapping("/todos")
 	@Valid
-	public List<ToDoResponse> getAll() {
+	public List<ToDoResponse> getAll(@RequestParam(required = false) Boolean isCompleted) {
+		if (isCompleted != null) {
+			if (isCompleted) {
+				return toDoService.getAllCompleted();
+			}
+			return toDoService.getAllInProgress();
+		}
 		return toDoService.getAll();
 	}
 
diff --git a/src/main/java/com/example/demo/service/ToDoService.java b/src/main/java/com/example/demo/service/ToDoService.java
index 57df487..f36c6a0 100644
--- a/src/main/java/com/example/demo/service/ToDoService.java
+++ b/src/main/java/com/example/demo/service/ToDoService.java
@@ -1,67 +1,82 @@
 package com.example.demo.service;
 
-import java.util.List;
-import java.util.stream.Collectors;
-
-import org.springframework.stereotype.Service;
-
 import com.example.demo.dto.ToDoResponse;
 import com.example.demo.dto.ToDoSaveRequest;
 import com.example.demo.dto.mapper.ToDoEntityToResponseMapper;
 import com.example.demo.exception.ToDoNotFoundException;
 import com.example.demo.model.ToDoEntity;
 import com.example.demo.repository.ToDoRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static com.example.demo.repository.specification.ToDoSpecifications.isCompleted;
+import static com.example.demo.repository.specification.ToDoSpecifications.isInProgress;
+import static org.springframework.data.jpa.domain.Specification.where;
 
 @Service
 public class ToDoService {
-	
-	private final ToDoRepository toDoRepository;
 
-	public ToDoService(ToDoRepository toDoRepository) {
-		this.toDoRepository = toDoRepository;
-	}
-	
-	public List<ToDoResponse> getAll() {
-		return toDoRepository.findAll().stream()
-			.map(ToDoEntityToResponseMapper::map)
-			.collect(Collectors.toList()); 
-	}
+    private final ToDoRepository toDoRepository;
+
+    public ToDoService(ToDoRepository toDoRepository) {
+        this.toDoRepository = toDoRepository;
+    }
+
+    public List<ToDoResponse> getAll() {
+        return toDoRepository.findAll().stream()
+                .map(ToDoEntityToResponseMapper::map)
+                .collect(Collectors.toList());
+    }
+
+    public List<ToDoResponse> getAllCompleted() {
+        return toDoRepository.findAll(where(isCompleted())).stream()
+                .map(ToDoEntityToResponseMapper::map)
+                .collect(Collectors.toList());
+    }
+
+    public List<ToDoResponse> getAllInProgress() {
+        return toDoRepository.findAll(where(isInProgress())).stream()
+                .map(ToDoEntityToResponseMapper::map)
+                .collect(Collectors.toList());
+    }
 
-	public ToDoResponse upsert(ToDoSaveRequest toDoDTO) throws ToDoNotFoundException {
-		ToDoEntity todo;
-		//update if it has id or create if it hasn't
-		if (toDoDTO.id == null) {
-			todo = new ToDoEntity(toDoDTO.text);
-		} else {
-			todo = toDoRepository.findById(toDoDTO.id).orElseThrow(() -> new ToDoNotFoundException(toDoDTO.id));
-			todo.setText(toDoDTO.text);
-		}
-		return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
-	}
+    public ToDoResponse upsert(ToDoSaveRequest toDoDTO) throws ToDoNotFoundException {
+        ToDoEntity todo;
+        //update if it has id or create if it hasn't
+        if (toDoDTO.id == null) {
+            todo = new ToDoEntity(toDoDTO.text);
+        } else {
+            todo = toDoRepository.findById(toDoDTO.id).orElseThrow(() -> new ToDoNotFoundException(toDoDTO.id));
+            todo.setText(toDoDTO.text);
+        }
+        return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
+    }
 
-	public ToDoResponse completeToDo(Long id) throws ToDoNotFoundException {
-		ToDoEntity todo = toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id));
-		todo.completeNow();
-		return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
-	}
+    public ToDoResponse completeToDo(Long id) throws ToDoNotFoundException {
+        ToDoEntity todo = toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id));
+        todo.completeNow();
+        return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
+    }
 
-	public ToDoResponse cancelToDo(Long id) throws ToDoNotFoundException {
-		ToDoEntity todo = toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id));
-		todo.cancelNow();
-		return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
-	}
+    public ToDoResponse cancelToDo(Long id) throws ToDoNotFoundException {
+        ToDoEntity todo = toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id));
+        todo.cancelNow();
+        return ToDoEntityToResponseMapper.map(toDoRepository.save(todo));
+    }
 
-	public ToDoResponse getOne(Long id) throws ToDoNotFoundException {
-		return  ToDoEntityToResponseMapper.map(
-			toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id))
-		);
-	}
+    public ToDoResponse getOne(Long id) throws ToDoNotFoundException {
+        return ToDoEntityToResponseMapper.map(
+                toDoRepository.findById(id).orElseThrow(() -> new ToDoNotFoundException(id))
+        );
+    }
 
-	public void deleteOne(Long id) {
-		toDoRepository.deleteById(id);
-	}
+    public void deleteOne(Long id) {
+        toDoRepository.deleteById(id);
+    }
 
-	public void deleteAll() {
-		toDoRepository.deleteAll();
-	}
+    public void deleteAll() {
+        toDoRepository.deleteAll();
+    }
 }