diff --git a/app/build.gradle b/app/build.gradle
index f3b6630..364a4d9 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -65,6 +65,8 @@ dependencies {
 
     implementation "androidx.preference:preference-ktx:1.1.1"
 
+    implementation 'com.jakewharton.timber:timber:5.0.1'
+
     testImplementation "junit:junit:4.13.2"
 
     androidTestImplementation "androidx.test.ext:junit:1.1.3"
diff --git a/app/src/main/java/gq/kirmanak/mealie/MainActivity.kt b/app/src/main/java/gq/kirmanak/mealie/MainActivity.kt
index 8127803..0be5194 100644
--- a/app/src/main/java/gq/kirmanak/mealie/MainActivity.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/MainActivity.kt
@@ -4,11 +4,13 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import dagger.hilt.android.AndroidEntryPoint
 import gq.kirmanak.mealie.databinding.MainActivityBinding
+import timber.log.Timber
 
 @AndroidEntryPoint
 class MainActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        Timber.v("onCreate() called with: savedInstanceState = $savedInstanceState")
         val binding = MainActivityBinding.inflate(layoutInflater)
         setContentView(binding.root)
     }
diff --git a/app/src/main/java/gq/kirmanak/mealie/MealieApp.kt b/app/src/main/java/gq/kirmanak/mealie/MealieApp.kt
index efcfabe..1aaeb06 100644
--- a/app/src/main/java/gq/kirmanak/mealie/MealieApp.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/MealieApp.kt
@@ -2,6 +2,13 @@ package gq.kirmanak.mealie
 
 import android.app.Application
 import dagger.hilt.android.HiltAndroidApp
+import timber.log.Timber
 
 @HiltAndroidApp
-class MealieApp : Application()
\ No newline at end of file
+class MealieApp : Application() {
+    override fun onCreate() {
+        super.onCreate()
+        if (BuildConfig.DEBUG) Timber.plant(Timber.DebugTree())
+        Timber.v("onCreate() called")
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/gq/kirmanak/mealie/data/RetrofitBuilder.kt b/app/src/main/java/gq/kirmanak/mealie/data/RetrofitBuilder.kt
index ab0ec63..72d772b 100644
--- a/app/src/main/java/gq/kirmanak/mealie/data/RetrofitBuilder.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/data/RetrofitBuilder.kt
@@ -5,11 +5,13 @@ import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.json.Json
 import okhttp3.MediaType
 import retrofit2.Retrofit
+import timber.log.Timber
 import javax.inject.Inject
 
 @ExperimentalSerializationApi
 class RetrofitBuilder @Inject constructor() {
     fun buildRetrofit(baseUrl: String): Retrofit {
+        Timber.v("buildRetrofit() called with: baseUrl = $baseUrl")
         val url = if (baseUrl.startsWith("http")) baseUrl else "https://$baseUrl"
         val contentType = MediaType.get("application/json")
         return Retrofit.Builder()
diff --git a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthDataSourceImpl.kt b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthDataSourceImpl.kt
index f8f4712..f64ab4b 100644
--- a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthDataSourceImpl.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthDataSourceImpl.kt
@@ -3,6 +3,7 @@ package gq.kirmanak.mealie.data.auth
 import gq.kirmanak.mealie.data.RetrofitBuilder
 import kotlinx.serialization.ExperimentalSerializationApi
 import retrofit2.create
+import timber.log.Timber
 import javax.inject.Inject
 
 @ExperimentalSerializationApi
@@ -14,12 +15,15 @@ class AuthDataSourceImpl @Inject constructor(
         password: String,
         baseUrl: String
     ): Result<String> {
+        Timber.v("authenticate() called with: username = $username, password = $password, baseUrl = $baseUrl")
         val authService = retrofitBuilder.buildRetrofit(baseUrl).create<AuthService>()
         val response = try {
             authService.getToken(username, password)
         } catch (e: Exception) {
+            Timber.e("Authenticate() exception", e)
             return Result.failure(e)
         }
+        Timber.d("authenticate() response is $response")
         return Result.success(response.accessToken)
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthRepoImpl.kt b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthRepoImpl.kt
index cf5b3e4..8f0a383 100644
--- a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthRepoImpl.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthRepoImpl.kt
@@ -1,19 +1,27 @@
 package gq.kirmanak.mealie.data.auth
 
+import timber.log.Timber
 import javax.inject.Inject
 
 class AuthRepoImpl @Inject constructor(
     private val dataSource: AuthDataSource,
     private val storage: AuthStorage
 ) : AuthRepo {
-    override suspend fun isAuthenticated(): Boolean = storage.isAuthenticated()
+    override suspend fun isAuthenticated(): Boolean {
+        Timber.v("isAuthenticated")
+        val authenticated = storage.isAuthenticated()
+        Timber.d("isAuthenticated() response $authenticated")
+        return authenticated
+    }
 
     override suspend fun authenticate(
         username: String,
         password: String,
         baseUrl: String
     ): Throwable? {
+        Timber.v("authenticate() called with: username = $username, password = $password, baseUrl = $baseUrl")
         val authResult = dataSource.authenticate(username, password, baseUrl)
+        Timber.d("authenticate result is $authResult")
         if (authResult.isFailure) return authResult.exceptionOrNull()
         val token = checkNotNull(authResult.getOrNull())
         storage.storeToken(token)
diff --git a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthStorageImpl.kt b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthStorageImpl.kt
index 666eed0..2b51fdc 100644
--- a/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthStorageImpl.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/data/auth/AuthStorageImpl.kt
@@ -6,6 +6,7 @@ import androidx.preference.PreferenceManager
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
+import timber.log.Timber
 import javax.inject.Inject
 
 private const val TOKEN_KEY = "AUTH_TOKEN"
@@ -15,10 +16,14 @@ class AuthStorageImpl @Inject constructor(@ApplicationContext private val contex
         get() = PreferenceManager.getDefaultSharedPreferences(context)
 
     override suspend fun isAuthenticated(): Boolean = withContext(Dispatchers.IO) {
-        sharedPreferences.getString(TOKEN_KEY, null) != null
+        Timber.v("isAuthenticated() called")
+        val token = sharedPreferences.getString(TOKEN_KEY, null)
+        Timber.d("isAuthenticated: token is $token")
+        token != null
     }
 
     override suspend fun storeToken(token: String) {
+        Timber.d("storeToken() called with: token = $token")
         sharedPreferences.edit().putString(TOKEN_KEY, token).apply()
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt b/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt
index b0d010a..ebf1c57 100644
--- a/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationFragment.kt
@@ -1,7 +1,6 @@
 package gq.kirmanak.mealie.ui.auth
 
 import android.os.Bundle
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -13,6 +12,7 @@ import androidx.lifecycle.lifecycleScope
 import com.google.android.material.textfield.TextInputLayout
 import dagger.hilt.android.AndroidEntryPoint
 import gq.kirmanak.mealie.databinding.FragmentAuthenticationBinding
+import timber.log.Timber
 
 private const val TAG = "AuthenticationFragment"
 
@@ -25,6 +25,7 @@ class AuthenticationFragment : Fragment() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
+        Timber.v("onCreate() called with: savedInstanceState = $savedInstanceState")
         checkIfAuthenticatedAlready()
     }
 
@@ -33,18 +34,19 @@ class AuthenticationFragment : Fragment() {
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View {
+        Timber.v("onCreateView() called with: inflater = $inflater, container = $container, savedInstanceState = $savedInstanceState")
         _binding = FragmentAuthenticationBinding.inflate(inflater, container, false)
         return binding.root
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
-        binding.button.setOnClickListener {
-            onLoginClicked()
-        }
+        Timber.v("onViewCreated() called with: view = $view, savedInstanceState = $savedInstanceState")
+        binding.button.setOnClickListener { onLoginClicked() }
     }
 
     private fun checkIfAuthenticatedAlready() {
+        Timber.v("checkIfAuthenticatedAlready() called")
         lifecycleScope.launchWhenCreated {
             Toast.makeText(
                 requireContext(),
@@ -56,6 +58,7 @@ class AuthenticationFragment : Fragment() {
     }
 
     private fun onLoginClicked() {
+        Timber.v("onLoginClicked() called")
         val email: String
         val pass: String
         val url: String
@@ -72,7 +75,6 @@ class AuthenticationFragment : Fragment() {
         }
         lifecycleScope.launchWhenResumed {
             val exception = viewModel.authenticate(email, pass, url)
-            Log.e(TAG, "onLoginClicked: ", exception)
             Toast.makeText(
                 requireContext(),
                 "Exception is ${exception?.message ?: "null"}",
@@ -86,7 +88,9 @@ class AuthenticationFragment : Fragment() {
         inputLayout: TextInputLayout,
         errorText: () -> String
     ): String? {
+        Timber.v("checkIfInputIsEmpty() called with: input = " + input + ", inputLayout = " + inputLayout + ", errorText = " + errorText)
         val text = input.text?.toString()
+        Timber.d("Input text is \"$text\"")
         if (text.isNullOrBlank()) {
             inputLayout.error = errorText()
             return null
@@ -96,6 +100,7 @@ class AuthenticationFragment : Fragment() {
 
     override fun onDestroyView() {
         super.onDestroyView()
+        Timber.v("onDestroyView() called")
         _binding = null
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationViewModel.kt b/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationViewModel.kt
index c19fec8..df457f0 100644
--- a/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationViewModel.kt
+++ b/app/src/main/java/gq/kirmanak/mealie/ui/auth/AuthenticationViewModel.kt
@@ -3,15 +3,29 @@ package gq.kirmanak.mealie.ui.auth
 import androidx.lifecycle.ViewModel
 import dagger.hilt.android.lifecycle.HiltViewModel
 import gq.kirmanak.mealie.data.auth.AuthRepo
+import timber.log.Timber
 import javax.inject.Inject
 
 @HiltViewModel
 class AuthenticationViewModel @Inject constructor(
     private val authRepo: AuthRepo
 ) : ViewModel() {
-    suspend fun isAuthenticated(): Boolean = authRepo.isAuthenticated()
+    init {
+        Timber.v("constructor called")
+    }
+
+    suspend fun isAuthenticated(): Boolean {
+        Timber.v("isAuthenticated() called")
+        val result = authRepo.isAuthenticated()
+        Timber.d("isAuthenticated() returned: $result")
+        return result
+    }
 
     suspend fun authenticate(username: String, password: String, baseUrl: String): Throwable? {
-        return authRepo.authenticate(username, password, baseUrl)
+        Timber.v("authenticate() called with: username = $username, password = $password, baseUrl = $baseUrl")
+        val result = authRepo.authenticate(username, password, baseUrl)
+        if (result == null) Timber.d("authenticate() returns null")
+        else Timber.e("authenticate() returns error", result)
+        return result
     }
 }
\ No newline at end of file