diff --git a/app/src/main/java/be/ugent/sel/studeez/common/composable/ButtonComposable.kt b/app/src/main/java/be/ugent/sel/studeez/common/composable/ButtonComposable.kt
index 3fa9bd2..9751750 100644
--- a/app/src/main/java/be/ugent/sel/studeez/common/composable/ButtonComposable.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/common/composable/ButtonComposable.kt
@@ -2,7 +2,6 @@ package be.ugent.sel.studeez.common.composable
 
 import androidx.annotation.StringRes
 import androidx.compose.foundation.BorderStroke
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.*
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
@@ -13,6 +12,7 @@ import androidx.compose.ui.unit.sp
 import be.ugent.sel.studeez.R
 import be.ugent.sel.studeez.common.ext.basicButton
 import be.ugent.sel.studeez.common.ext.card
+import be.ugent.sel.studeez.common.ext.defaultButtonShape
 
 @Composable
 fun BasicTextButton(@StringRes text: Int, modifier: Modifier, action: () -> Unit) {
@@ -30,7 +30,7 @@ fun BasicButton(
     Button(
         onClick = onClick,
         modifier = modifier,
-        shape = RoundedCornerShape(20.dp),
+        shape = defaultButtonShape(),
         colors = colors,
         border = border,
     ) {
@@ -47,6 +47,25 @@ fun BasicButtonPreview() {
     BasicButton(text = R.string.add_timer, modifier = Modifier.basicButton()) {}
 }
 
+@Composable
+fun NotInternationalisedButton(
+    text: String,
+    modifier: Modifier = Modifier,
+    colors: ButtonColors = ButtonDefaults.buttonColors(),
+    border: BorderStroke? = null,
+    onClick: () -> Unit
+) {
+    Button(
+        onClick = onClick,
+        modifier = modifier,
+        shape = defaultButtonShape(),
+        colors = colors,
+        border = border
+    ) {
+        Text(text = text)
+    }
+}
+
 @Composable
 fun StealthButton(
     @StringRes text: Int,
diff --git a/app/src/main/java/be/ugent/sel/studeez/common/composable/TextFieldComposable.kt b/app/src/main/java/be/ugent/sel/studeez/common/composable/TextFieldComposable.kt
index 2c0b450..47dbb0b 100644
--- a/app/src/main/java/be/ugent/sel/studeez/common/composable/TextFieldComposable.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/common/composable/TextFieldComposable.kt
@@ -41,10 +41,12 @@ fun BasicField(
 fun LabelledInputField(
     value: String,
     onNewValue: (String) -> Unit,
-    @StringRes label: Int
+    @StringRes label: Int,
+    singleLine: Boolean = false
 ) {
     OutlinedTextField(
         value = value,
+        singleLine = singleLine,
         onValueChange = onNewValue,
         label = { Text(text = stringResource(id = label)) },
         modifier = Modifier.fieldModifier()
diff --git a/app/src/main/java/be/ugent/sel/studeez/common/composable/TimePickerButtonComposable.kt b/app/src/main/java/be/ugent/sel/studeez/common/composable/TimePickerButtonComposable.kt
new file mode 100644
index 0000000..02bd0d7
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/common/composable/TimePickerButtonComposable.kt
@@ -0,0 +1,48 @@
+package be.ugent.sel.studeez.common.composable
+
+import android.app.TimePickerDialog
+import android.app.TimePickerDialog.OnTimeSetListener
+import android.content.Context
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.Button
+import androidx.compose.material.ButtonColors
+import androidx.compose.material.ButtonDefaults
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.unit.dp
+import be.ugent.sel.studeez.data.local.models.timer_functional.HoursMinutesSeconds
+import java.util.*
+
+@Composable
+fun TimePickerButton(
+    hoursMinutesSeconds: HoursMinutesSeconds,
+    modifier: Modifier = Modifier,
+    colors: ButtonColors = ButtonDefaults.buttonColors(),
+    border: BorderStroke? = null,
+    onTimeSetListener: OnTimeSetListener
+) {
+    val context = LocalContext.current
+    Button(
+        onClick = { pickDuration(context, onTimeSetListener) },
+        modifier = modifier,
+        shape = RoundedCornerShape(20.dp),
+        colors = colors,
+        border = border
+    ) {
+        Text(text = hoursMinutesSeconds.toString())
+    }
+}
+
+private fun pickDuration(context: Context, listener: OnTimeSetListener) {
+    val timePickerDialog = TimePickerDialog(
+        context,
+        listener,
+        0,
+        0,
+        true
+    )
+    timePickerDialog.show()
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/common/ext/ShapeExt.kt b/app/src/main/java/be/ugent/sel/studeez/common/ext/ShapeExt.kt
new file mode 100644
index 0000000..2114a74
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/common/ext/ShapeExt.kt
@@ -0,0 +1,8 @@
+package be.ugent.sel.studeez.common.ext
+
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.ui.unit.dp
+
+fun defaultButtonShape(): RoundedCornerShape {
+    return RoundedCornerShape(20.dp)
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/EditTimerState.kt b/app/src/main/java/be/ugent/sel/studeez/data/EditTimerState.kt
new file mode 100644
index 0000000..9686e94
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/data/EditTimerState.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.data
+
+class EditTimerState {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/HoursMinutesSeconds.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/HoursMinutesSeconds.kt
index 856aa26..2f630c9 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/HoursMinutesSeconds.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/HoursMinutesSeconds.kt
@@ -1,4 +1,15 @@
 package be.ugent.sel.studeez.data.local.models.timer_functional
 
-data class HoursMinutesSeconds(val hours: String, val minutes: String, val seconds: String
-)
\ No newline at end of file
+data class HoursMinutesSeconds(val hours: Int, val minutes: Int, val seconds: Int) {
+
+    fun getTotalSeconds(): Int {
+        return hours * 60 * 60 + minutes * 60 + seconds
+    }
+
+    override fun toString(): String {
+        val hoursString = hours.toString().padStart(2, '0')
+        val minutesString = minutes.toString().padStart(2, '0')
+        val secondsString = seconds.toString().padStart(2, '0')
+        return "$hoursString : $minutesString : $secondsString"
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/Time.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/Time.kt
index ec7702d..c512d96 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/Time.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_functional/Time.kt
@@ -17,11 +17,7 @@ class Time(initialTime: Int) {
         val minutes: Int = (time / (60)) % 60
         val seconds: Int = time % 60
 
-        return HoursMinutesSeconds(
-            hours.toString().padStart(2, '0'),
-            minutes.toString().padStart(2, '0'),
-            seconds.toString().padStart(2, '0')
-        )
+        return HoursMinutesSeconds(hours, minutes, seconds)
     }
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
index 5e06536..d88e39f 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/CustomTimerInfo.kt
@@ -6,11 +6,10 @@ import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimer
 class CustomTimerInfo(
     name: String,
     description: String,
-    private val studyTime: Int,
+    var studyTime: Int,
     id: String = ""
 ):  TimerInfo(id, name, description) {
 
-
     override fun getFunctionalTimer(): FunctionalTimer {
         return FunctionalCustomTimer(studyTime)
     }
@@ -24,4 +23,8 @@ class CustomTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitCustomTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
index d459a4e..45f7fd7 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/EndlessTimerInfo.kt
@@ -22,4 +22,8 @@ class EndlessTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitEndlessTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
index 18bcea6..dbbb0be 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/PomodoroTimerInfo.kt
@@ -2,13 +2,14 @@ package be.ugent.sel.studeez.data.local.models.timer_info
 
 import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalPomodoroTimer
 import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimer
+import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimerVisitor
 
 class PomodoroTimerInfo(
     name: String,
     description: String,
-    private val studyTime: Int,
-    private val breakTime: Int,
-    private val repeats: Int,
+    val studyTime: Int,
+    val breakTime: Int,
+    val repeats: Int,
     id: String = ""
 ):  TimerInfo(id, name, description) {
 
@@ -28,4 +29,8 @@ class PomodoroTimerInfo(
         )
     }
 
+    override fun <T> accept(visitor: TimerInfoVisitor<T>): T {
+        return visitor.visitBreakTimerInfo(this)
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
index 343e7e3..e4deded 100644
--- a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfo.kt
@@ -7,8 +7,8 @@ import be.ugent.sel.studeez.data.local.models.timer_functional.FunctionalTimer
  */
 abstract class TimerInfo(
     val id: String,
-    val name: String,
-    val description: String
+    var name: String,
+    var description: String
 ) {
 
     /**
@@ -21,6 +21,7 @@ abstract class TimerInfo(
      * TODO implementaties hebben nog hardgecodeerde strings.
      */
     abstract fun asJson(): Map<String, Any>
+    abstract fun <T> accept(visitor: TimerInfoVisitor<T>): T
 
 }
 
diff --git a/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt
new file mode 100644
index 0000000..e331c8d
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/data/local/models/timer_info/TimerInfoVisitor.kt
@@ -0,0 +1,11 @@
+package be.ugent.sel.studeez.data.local.models.timer_info
+
+interface TimerInfoVisitor<T> {
+
+    fun visitCustomTimerInfo(customTimerInfo: CustomTimerInfo): T
+
+    fun visitEndlessTimerInfo(endlessTimerInfo: EndlessTimerInfo): T
+
+    fun visitBreakTimerInfo(pomodoroTimerInfo: PomodoroTimerInfo): T
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/GetTimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/GetTimerEditScreen.kt
new file mode 100644
index 0000000..c6579e8
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/GetTimerEditScreen.kt
@@ -0,0 +1,35 @@
+package be.ugent.sel.studeez.screens.timer_edit
+
+import android.annotation.SuppressLint
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import be.ugent.sel.studeez.R
+import be.ugent.sel.studeez.common.composable.BasicButton
+import be.ugent.sel.studeez.common.ext.basicButton
+import be.ugent.sel.studeez.data.local.models.timer_info.CustomTimerInfo
+import be.ugent.sel.studeez.data.local.models.timer_info.EndlessTimerInfo
+import be.ugent.sel.studeez.data.local.models.timer_info.PomodoroTimerInfo
+import be.ugent.sel.studeez.data.local.models.timer_info.TimerInfoVisitor
+
+class GetTimerEditView: TimerInfoVisitor<Unit> {
+
+    @SuppressLint("ComposableNaming")
+    override fun visitCustomTimerInfo(customTimerInfo: CustomTimerInfo) {
+
+    }
+
+    @SuppressLint("ComposableNaming")
+    override fun visitEndlessTimerInfo(endlessTimerInfo: EndlessTimerInfo) {
+
+    }
+
+    @SuppressLint("ComposableNaming")
+    override fun visitBreakTimerInfo(pomodoroTimerInfo: PomodoroTimerInfo) {
+
+    }
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditScreen.kt
new file mode 100644
index 0000000..ac1ff8a
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditScreen.kt
@@ -0,0 +1,2 @@
+package be.ugent.sel.studeez.screens.timer_edit
+
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditViewModel.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditViewModel.kt
new file mode 100644
index 0000000..20f5952
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/TimerEditViewModel.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.screens.timer_edit
+
+class TimerEditViewModel {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/AbstractTimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/AbstractTimerEditScreen.kt
new file mode 100644
index 0000000..59b04e7
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/AbstractTimerEditScreen.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.screens.timer_edit
+
+abstract class AbstractTimerEditScreen {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/BreakTimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/BreakTimerEditScreen.kt
new file mode 100644
index 0000000..1405682
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/BreakTimerEditScreen.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.screens.timer_edit.editScreens
+
+class BreakTimerEditScreen {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/CustomTimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/CustomTimerEditScreen.kt
new file mode 100644
index 0000000..bbe66ec
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/CustomTimerEditScreen.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.screens.timer_edit
+
+class CustomTimerEditScreen {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/EndlessTimerEditScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/EndlessTimerEditScreen.kt
new file mode 100644
index 0000000..5c6263d
--- /dev/null
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_edit/editScreens/EndlessTimerEditScreen.kt
@@ -0,0 +1,4 @@
+package be.ugent.sel.studeez.screens.timer_edit.editScreens
+
+class EndlessTimerEditScreen {
+}
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_overview/TimerOverviewScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_overview/TimerOverviewScreen.kt
index 9489a30..d6d7b07 100644
--- a/app/src/main/java/be/ugent/sel/studeez/screens/timer_overview/TimerOverviewScreen.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_overview/TimerOverviewScreen.kt
@@ -61,6 +61,15 @@ fun TimerOverviewScreen(
     ) {
         Column {
             LazyColumn {
+                // Custom timer, select new duration each time
+                item {
+                    TimerEntry(timerInfo = CustomTimerInfo(
+                        name = resources().getString(R.string.custom_name),
+                        description = resources().getString(R.string.custom_name),
+                        studyTime = 0
+                    ))
+                }
+
                 // Default Timers, cannot be edited
                 items(timerOverviewActions.getDefaultTimers()) {
                     TimerEntry(timerInfo = it) {}
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionScreen.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionScreen.kt
index ac46b5c..5ef775e 100644
--- a/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionScreen.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionScreen.kt
@@ -1,14 +1,20 @@
 package be.ugent.sel.studeez.screens.timer_selection
 
+import android.widget.TimePicker
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.tooling.preview.Preview
 import be.ugent.sel.studeez.R
 import be.ugent.sel.studeez.common.composable.SecondaryScreenTemplate
 import be.ugent.sel.studeez.common.composable.StealthButton
+import be.ugent.sel.studeez.common.composable.TimePickerButton
 import be.ugent.sel.studeez.common.composable.TimerEntry
+import be.ugent.sel.studeez.data.local.models.timer_functional.HoursMinutesSeconds
+import be.ugent.sel.studeez.data.local.models.timer_functional.Time
+import be.ugent.sel.studeez.data.local.models.timer_info.CustomTimerInfo
 import be.ugent.sel.studeez.data.local.models.timer_info.TimerInfo
 import be.ugent.sel.studeez.resources
 import kotlinx.coroutines.flow.Flow
@@ -17,6 +23,8 @@ import kotlinx.coroutines.flow.flowOf
 data class TimerSelectionActions(
     val getAllTimers: () -> Flow<List<TimerInfo>>,
     val startSession: (TimerInfo) -> Unit,
+    val pickDuration: (TimePicker?, Int, Int) -> Unit,
+    val customTimeStudyTime: Int
 )
 
 fun getTimerSelectionActions(
@@ -26,6 +34,10 @@ fun getTimerSelectionActions(
     return TimerSelectionActions(
         getAllTimers = viewModel::getAllTimers,
         startSession = { viewModel.startSession(open, it) },
+        pickDuration = { _, hour: Int, minute: Int ->
+            viewModel.customTimerStudyTime.value = hour * 60 * 60 + minute * 60
+        },
+        customTimeStudyTime = viewModel.customTimerStudyTime.value
     )
 }
 
@@ -52,6 +64,11 @@ fun TimerSelectionScreen(
         popUp = popUp
     ) {
         LazyColumn {
+            // Custom timer with duration selection button
+            item {
+                CustomTimerEntry(timerSelectionActions)
+            }
+
             // All timers
             items(timers.value) { timerInfo ->
                 TimerEntry(
@@ -68,11 +85,39 @@ fun TimerSelectionScreen(
     }
 }
 
+@Composable
+fun CustomTimerEntry(
+    timerSelectionActions: TimerSelectionActions
+) {
+    val timerInfo = CustomTimerInfo(
+        name = resources().getString(R.string.custom_name),
+        description = resources().getString(R.string.custom_description),
+        studyTime = timerSelectionActions.customTimeStudyTime
+    )
+    val hms: HoursMinutesSeconds = Time(timerInfo.studyTime).getAsHMS()
+
+    TimerEntry(
+        timerInfo = timerInfo,
+        leftButton = {
+            StealthButton(
+                text = R.string.start,
+                onClick = { timerSelectionActions.startSession(timerInfo) }
+            )
+        },
+        rightButton = {
+            TimePickerButton(
+                hoursMinutesSeconds = hms,
+                onTimeSetListener = timerSelectionActions.pickDuration
+            )
+        }
+    )
+}
+
 @Preview
 @Composable
 fun TimerSelectionPreview() {
     TimerSelectionScreen(
-        timerSelectionActions = TimerSelectionActions({ flowOf() }, {}),
+        timerSelectionActions = TimerSelectionActions({ flowOf() }, {}, { _, _, _ -> {} }, 0),
         popUp = {}
     )
 }
\ No newline at end of file
diff --git a/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionViewModel.kt b/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionViewModel.kt
index c555bfa..ab42973 100644
--- a/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionViewModel.kt
+++ b/app/src/main/java/be/ugent/sel/studeez/screens/timer_selection/TimerSelectionViewModel.kt
@@ -1,5 +1,9 @@
 package be.ugent.sel.studeez.screens.timer_selection
 
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
 import be.ugent.sel.studeez.data.SelectedTimerState
 import be.ugent.sel.studeez.data.local.models.timer_info.TimerInfo
 import be.ugent.sel.studeez.domain.LogService
@@ -17,6 +21,8 @@ class TimerSelectionViewModel @Inject constructor(
     logService: LogService
 ) : StudeezViewModel(logService) {
 
+    var customTimerStudyTime: MutableState<Int> = mutableStateOf(0)
+
     fun getAllTimers() : Flow<List<TimerInfo>> {
         return timerDAO.getAllTimers()
     }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 935dc7d..1453608 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -57,6 +57,7 @@
     <string name="timers">Timers</string>
     <string name="edit">Edit</string>
     <string name="add_timer">Add timer</string>
+    <string name="pick_time">Select time</string>
     <string name="state_focus">Focus!</string>
     <plurals name="state_focus_remaining">
         <item quantity="zero">Focus one more time!</item>
@@ -65,6 +66,8 @@
     </plurals>
     <string name="state_done">Done!</string>
     <string name="state_take_a_break">Take a break!</string>
+    <string name="custom_name">Custom</string>
+    <string name="custom_description">Select how long you want to study</string>
 
     <!-- Settings -->
     <string name="settings_temp_description">Looks like you found the settings screen! In the future, this will enable you to edit your preferenes such as light/dark mode, end sessions automatically when we detect you are gone etc.</string> <!-- TODO Remove this description line once implemented. -->