diff --git a/app/src/main/java/com/example/saveup/view/login/LoginActivity.kt b/app/src/main/java/com/example/saveup/view/login/LoginActivity.kt
index bbdbef0..5d11992 100644
--- a/app/src/main/java/com/example/saveup/view/login/LoginActivity.kt
+++ b/app/src/main/java/com/example/saveup/view/login/LoginActivity.kt
@@ -7,9 +7,9 @@ import android.text.TextWatcher
 import android.view.View
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
-import com.example.saveup.view.MainActivity
 import com.example.saveup.R
 import com.example.saveup.databinding.ActivityLoginBinding
+import com.example.saveup.view.MainActivity
 import com.google.android.material.textfield.TextInputLayout
 import com.google.firebase.auth.FirebaseAuth
 
@@ -52,7 +52,11 @@ class LoginActivity : AppCompatActivity() {
                         finish()
                     } else {
                         enableForm(true)
-                        Toast.makeText(this, it.exception.toString(), Toast.LENGTH_LONG).show()
+                        Toast.makeText(
+                            this,
+                            it.exception?.message ?: resources.getString(R.string.errLoggingIn),
+                            Toast.LENGTH_LONG
+                        ).show()
                     }
                 }
             }
diff --git a/app/src/main/java/com/example/saveup/view/login/SignUpActivity.kt b/app/src/main/java/com/example/saveup/view/login/SignUpActivity.kt
index d88248d..135a3e6 100644
--- a/app/src/main/java/com/example/saveup/view/login/SignUpActivity.kt
+++ b/app/src/main/java/com/example/saveup/view/login/SignUpActivity.kt
@@ -55,7 +55,11 @@ class SignUpActivity : AppCompatActivity() {
                     viewModel.saveUserInFirestore(it.result.user)
                 } else {
                     enableForm(true)
-                    Toast.makeText(this, it.exception.toString(), Toast.LENGTH_LONG).show()
+                    Toast.makeText(
+                        this,
+                        it.exception?.message ?: resources.getString(R.string.errLoggingIn),
+                        Toast.LENGTH_LONG
+                    ).show()
                 }
             }
         }
@@ -82,7 +86,7 @@ class SignUpActivity : AppCompatActivity() {
             binding.outlinedTextFieldEmail.error = resources.getString(R.string.errCampoVacio)
             etFocus = binding.etEmail
         }
-        val minLen = 4
+        val minLen = 6
         if (password.length < minLen) {
             binding.outlinedTextFieldPassword.error =
                 resources.getString(R.string.errMinLengthPassword, minLen)
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2b2ec71..4fc5a8e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -42,8 +42,10 @@
     <string name="infoCreatedUser">Se ha creado el usuario</string>
     <string name="errMismatchingPasswords">Las contraseñas no coinciden</string>
     <string name="errMinLengthPassword">Tiene que tener al menos %1$d carácteres</string>
+    <string name="errSigningUp">Error al crear la cuenta</string>
     <string name="infoLoggedOut">Se ha cerrado la sesión</string>
     <string name="infoLoggedIn">Se ha iniciado sesión</string>
+    <string name="errLoggingIn">Error al iniciar sesión</string>
     <string name="titleGrupos">Mis grupos</string>
     <string name="addgroup">addGroup</string>
     <string name="stringBudget">Presupuesto</string>