diff --git a/components/settings/customization/advance-notice-days-slider.js b/components/settings/customization/advance-notice-days-slider.js
new file mode 100644
index 0000000..ece11f0
--- /dev/null
+++ b/components/settings/customization/advance-notice-days-slider.js
@@ -0,0 +1,56 @@
+import React from 'react'
+import { View } from 'react-native'
+import PropTypes from 'prop-types'
+import Slider from '@ptomasroos/react-native-multi-slider'
+import SliderLabel from './slider-label'
+
+import { styles } from './slider-styles'
+import {
+  ADVANCE_PERIOD_NOTICE_DAYS_MIN,
+  ADVANCE_PERIOD_NOTICE_DAYS_MAX,
+} from '../../../config'
+
+const AdvanceNoticeDaysSlider = ({
+  disabled,
+  advanceNoticeDays,
+  onAdvanceNoticeDaysChange,
+}) => {
+  const sliderAccentBackground = disabled
+    ? styles.disabledSliderAccentBackground
+    : styles.sliderAccentBackground
+
+  const sliderBackground = disabled
+    ? styles.disabledSliderBackground
+    : styles.sliderBackground
+
+  return (
+    <View style={styles.container}>
+      <Slider
+        customLabel={SliderLabel}
+        enableLabel={true}
+        markerStyle={styles.marker}
+        markerOffsetY={styles.markerOffsetY}
+        max={ADVANCE_PERIOD_NOTICE_DAYS_MAX}
+        min={ADVANCE_PERIOD_NOTICE_DAYS_MIN}
+        onValuesChange={onAdvanceNoticeDaysChange}
+        step={1}
+        showSteps={true}
+        snapped={true}
+        trackStyle={styles.slider}
+        values={[advanceNoticeDays]}
+        enabledOne={!disabled}
+        enabledTwo={false}
+        selectedStyle={sliderAccentBackground}
+        unselectedStyle={sliderBackground}
+      />
+    </View>
+  )
+}
+
+export default AdvanceNoticeDaysSlider
+
+AdvanceNoticeDaysSlider.propTypes = {
+  disabled: PropTypes.bool,
+  advanceNoticeDays: PropTypes.number,
+  onAdvanceNoticeDaysChange: PropTypes.func,
+}
diff --git a/components/settings/customization/slider-styles.js b/components/settings/customization/slider-styles.js
new file mode 100644
index 0000000..e28f31e
--- /dev/null
+++ b/components/settings/customization/slider-styles.js
@@ -0,0 +1,35 @@
+import { StyleSheet } from 'react-native'
+import { Colors, Sizes } from '../../../styles'
+
+export const styles = StyleSheet.create({
+  container: {
+    alignItems: 'center',
+    paddingTop: Sizes.base,
+  },
+  marker: {
+    backgroundColor: Colors.turquoiseDark,
+
+    borderRadius: 50,
+    elevation: 4,
+    height: Sizes.subtitle,
+    width: Sizes.subtitle,
+  },
+  slider: {
+    borderRadius: 25,
+    height: Sizes.small,
+    paddingTop: Sizes.base,
+  },
+  sliderAccentBackground: {
+    backgroundColor: Colors.turquoiseDark,
+  },
+  disabledSliderAccentBackground: {
+    backgroundColor: Colors.grey,
+  },
+  sliderBackground: {
+    backgroundColor: Colors.turquoise,
+  },
+  disabledSliderBackground: {
+    backgroundColor: Colors.greyLight,
+  },
+  markerOffsetY: Sizes.tiny,
+})
diff --git a/components/settings/customization/temperature-slider.js b/components/settings/customization/temperature-slider.js
index 7d91f7a..463b001 100644
--- a/components/settings/customization/temperature-slider.js
+++ b/components/settings/customization/temperature-slider.js
@@ -1,5 +1,5 @@
 import React, { useState } from 'react'
-import { StyleSheet, View } from 'react-native'
+import { View } from 'react-native'
 import PropTypes from 'prop-types'
 import Slider from '@ptomasroos/react-native-multi-slider'
 
@@ -7,9 +7,9 @@ import alertError from '../common/alert-error'
 import SliderLabel from './slider-label'
 
 import { scaleObservable, saveTempScale } from '../../../local-storage'
-import { Colors, Sizes } from '../../../styles'
 import labels from '../../../i18n/en/settings'
 import { TEMP_MIN, TEMP_MAX, TEMP_SLIDER_STEP } from '../../../config'
+import { styles } from './slider-styles'
 
 const TemperatureSlider = ({ disabled }) => {
   const savedValue = scaleObservable.value
@@ -40,7 +40,7 @@ const TemperatureSlider = ({ disabled }) => {
         customLabel={SliderLabel}
         enableLabel={true}
         markerStyle={styles.marker}
-        markerOffsetY={Sizes.tiny}
+        markerOffsetY={styles.markerOffsetY}
         max={TEMP_MAX}
         min={TEMP_MIN}
         onValuesChange={onTemperatureSliderChange}
@@ -61,34 +61,3 @@ export default TemperatureSlider
 TemperatureSlider.propTypes = {
   disabled: PropTypes.bool,
 }
-
-const styles = StyleSheet.create({
-  container: {
-    alignItems: 'center',
-    paddingTop: Sizes.base,
-  },
-  marker: {
-    backgroundColor: Colors.turquoiseDark,
-
-    borderRadius: 50,
-    elevation: 4,
-    height: Sizes.subtitle,
-    width: Sizes.subtitle,
-  },
-  slider: {
-    borderRadius: 25,
-    height: Sizes.small,
-  },
-  sliderAccentBackground: {
-    backgroundColor: Colors.turquoiseDark,
-  },
-  disabledSliderAccentBackground: {
-    backgroundColor: Colors.grey,
-  },
-  sliderBackground: {
-    backgroundColor: Colors.turquoise,
-  },
-  disabledSliderBackground: {
-    backgroundColor: Colors.greyLight,
-  },
-})
diff --git a/components/settings/reminders/period-reminder.js b/components/settings/reminders/period-reminder.js
new file mode 100644
index 0000000..b0bf81f
--- /dev/null
+++ b/components/settings/reminders/period-reminder.js
@@ -0,0 +1,54 @@
+import React, { useState } from 'react'
+import AppSwitch from '../../common/app-switch'
+import AdvanceNoticeDaysSlider from '../customization/advance-notice-days-slider'
+
+import {
+  periodReminderObservable,
+  savePeriodReminder,
+  periodPredictionObservable,
+  saveAdvanceNoticeDays,
+  advanceNoticeDaysObservable,
+} from '../../../local-storage'
+import labels from '../../../i18n/en/settings'
+
+const PeriodReminder = () => {
+  const isPeriodPredictionDisabled = !periodPredictionObservable.value
+
+  const [isPeriodReminderEnabled, setIsPeriodReminderEnabled] = useState(
+    periodReminderObservable.value.enabled
+  )
+
+  const [advanceNoticeDays, setAdvanceNoticeDays] = useState(
+    advanceNoticeDaysObservable.value
+  )
+
+  const periodReminderToggle = (isEnabled) => {
+    setIsPeriodReminderEnabled(isEnabled)
+    savePeriodReminder({ enabled: isEnabled })
+  }
+
+  const handleAdvanceNoticeDaysChange = (days) => {
+    setAdvanceNoticeDays(days)
+    saveAdvanceNoticeDays(days)
+  }
+
+  return (
+    <>
+      <AppSwitch
+        onToggle={periodReminderToggle}
+        text={labels.periodReminder.reminderText(advanceNoticeDays)}
+        value={isPeriodReminderEnabled}
+        disabled={isPeriodPredictionDisabled}
+      />
+      {isPeriodReminderEnabled && (
+        <AdvanceNoticeDaysSlider
+          disabled={isPeriodPredictionDisabled}
+          advanceNoticeDays={parseInt(advanceNoticeDays, 10)}
+          onAdvanceNoticeDaysChange={handleAdvanceNoticeDaysChange}
+        />
+      )}
+    </>
+  )
+}
+
+export default PeriodReminder
diff --git a/components/settings/reminders/reminders.js b/components/settings/reminders/reminders.js
index 1279d29..63f2cbb 100644
--- a/components/settings/reminders/reminders.js
+++ b/components/settings/reminders/reminders.js
@@ -1,13 +1,11 @@
-import React, { useState } from 'react'
+import React from 'react'
 
 import AppPage from '../../common/app-page'
-import AppSwitch from '../../common/app-switch'
 import Segment from '../../common/segment'
 import TemperatureReminder from './temperature-reminder'
+import PeriodReminder from './period-reminder'
 
 import {
-  periodReminderObservable,
-  savePeriodReminder,
   periodPredictionObservable,
   temperatureTrackingCategoryObservable,
 } from '../../../local-storage'
@@ -16,17 +14,7 @@ import labels from '../../../i18n/en/settings'
 import { Alert, Pressable } from 'react-native'
 
 const Reminders = () => {
-  const isPeriodPredictionDisabled = !periodPredictionObservable.value
-
-  const [isPeriodReminderEnabled, setIsPeriodReminderEnabled] = useState(
-    periodReminderObservable.value.enabled
-  )
-  const periodReminderToggle = (isEnabled) => {
-    setIsPeriodReminderEnabled(isEnabled)
-    savePeriodReminder({ enabled: isEnabled })
-  }
-
-  const reminderDisabledPrompt = () => {
+  const periodReminderDisabledPrompt = () => {
     if (!periodPredictionObservable.value) {
       Alert.alert(
         labels.periodReminder.alertNoPeriodReminder.title,
@@ -43,16 +31,12 @@ const Reminders = () => {
       )
     }
   }
+
   return (
     <AppPage>
-      <Pressable onPress={reminderDisabledPrompt}>
+      <Pressable onPress={periodReminderDisabledPrompt}>
         <Segment title={labels.periodReminder.title}>
-          <AppSwitch
-            onToggle={periodReminderToggle}
-            text={labels.periodReminder.reminderText}
-            value={isPeriodReminderEnabled}
-            disabled={isPeriodPredictionDisabled}
-          />
+          <PeriodReminder />
         </Segment>
       </Pressable>
       <Pressable onPress={tempReminderDisabledPrompt}>
diff --git a/config.js b/config.js
index 5d11e5d..fa854f6 100644
--- a/config.js
+++ b/config.js
@@ -33,6 +33,10 @@ export const TEMP_MAX = 39
 export const TEMP_MIN = 35
 export const TEMP_SLIDER_STEP = 0.5
 
+export const ADVANCE_PERIOD_NOTICE_DAYS_MIN = 1
+export const ADVANCE_PERIOD_NOTICE_DAYS_MAX = 7
+export const ADVANCE_PERIOD_NOTICE_DAYS_INIT_VALUE = 3
+
 export const HIT_SLOP = {
   top: verticalScale(20),
   bottom: verticalScale(20),
diff --git a/i18n/en/settings.js b/i18n/en/settings.js
index 7f00368..7c09c14 100644
--- a/i18n/en/settings.js
+++ b/i18n/en/settings.js
@@ -60,10 +60,13 @@ export default {
   },
   periodReminder: {
     title: 'Next period reminder',
-    reminderText:
-      'Get a notification 3 days before your next period is likely to start.',
-    notification: (daysToEndOfPrediction) =>
-      `Your next period is likely to start in 3 to ${daysToEndOfPrediction} days.`,
+    reminderText: (days) => {
+      const dayCount = parseInt(days, 10)
+      const dayText = dayCount === 1 ? '1 day' : `${dayCount} days`
+      return `Get a notification ${dayText} before your next period is likely to start.`
+    },
+    notification: (advanceNoticeDays, daysToEndOfPrediction) =>
+      `Your next period is likely to start in ${advanceNoticeDays} to ${daysToEndOfPrediction} days.`,
     alertNoPeriodReminder: {
       title: 'Period predictions turned off',
       message:
diff --git a/lib/notifications.js b/lib/notifications.js
index d34d752..566ac0d 100644
--- a/lib/notifications.js
+++ b/lib/notifications.js
@@ -2,9 +2,9 @@ import { Platform } from 'react-native'
 import {
   tempReminderObservable,
   periodReminderObservable,
+  advanceNoticeDaysObservable,
 } from '../local-storage'
 import * as PN from 'react-native-push-notification'
-import { requestNotifications } from 'react-native-permissions'
 import Moment from 'moment'
 import { LocalDate } from '@js-joda/core'
 
@@ -13,12 +13,14 @@ import { getBleedingDaysSortedByDate } from '../db'
 import cycleModule from './cycle'
 import nothingChanged from '../db/db-unchanged'
 
-export default function setupNotifications(navigate, setDate) {
-  Platform.OS === 'android' ? requestNotifications() : null
-  const PushNotification = Platform.OS === 'ios' ? PN : PN.default
+const DRIP_CHANNEL_ID = 'drip-channel-id'
+const TEMPERATURE_REMINDER_ID = '1'
+const PERIOD_REMINDER_ID = '2'
+const PushNotification = Platform.OS === 'ios' ? PN : PN.default
 
+export default function setupNotifications(navigate, setDate) {
   PushNotification.createChannel({
-    channelId: 'drip-channel-id', // (required)
+    channelId: DRIP_CHANNEL_ID, // (required)
     channelName: 'drip reminder', // (required)
     playSound: false, // (optional) default: true
   })
@@ -26,7 +28,10 @@ export default function setupNotifications(navigate, setDate) {
   PushNotification.configure({
     onNotification: (notification) => {
       // https://github.com/zo0r/react-native-push-notification/issues/966#issuecomment-479069106
-      if (notification.data?.id === '1' || notification.id === '1') {
+      if (
+        notification.data?.id === TEMPERATURE_REMINDER_ID ||
+        notification.id === TEMPERATURE_REMINDER_ID
+      ) {
         const todayDate = LocalDate.now().toString()
         setDate(todayDate)
         navigate('TemperatureEditView')
@@ -37,7 +42,7 @@ export default function setupNotifications(navigate, setDate) {
   })
 
   tempReminderObservable((reminder) => {
-    PushNotification.cancelLocalNotification({ id: '1' })
+    PushNotification.cancelLocalNotification({ id: TEMPERATURE_REMINDER_ID })
     if (reminder.enabled) {
       const [hours, minutes] = reminder.time.split(':')
       let target = new Moment()
@@ -50,57 +55,74 @@ export default function setupNotifications(navigate, setDate) {
       }
 
       PushNotification.localNotificationSchedule({
-        id: '1',
-        userInfo: { id: '1' },
+        id: TEMPERATURE_REMINDER_ID,
+        userInfo: { id: TEMPERATURE_REMINDER_ID },
         message: labels.tempReminder.notification,
         date: target.toDate(),
         vibrate: false,
         repeatType: 'day',
-        channelId: 'drip-channel-id',
+        channelId: DRIP_CHANNEL_ID,
         allowWhileIdle: true,
       })
     }
   }, false)
 
-  periodReminderObservable((reminder) => {
-    PushNotification.cancelLocalNotification({ id: '2' })
-    if (reminder.enabled) setupPeriodReminder()
-  }, false)
+  periodReminderObservable(() => updatePeriodNotification(), false)
+  advanceNoticeDaysObservable(() => updatePeriodNotification(), false)
 
   getBleedingDaysSortedByDate().addListener((_, changes) => {
     // the listener fires on setup, so we check if there were actually any changes
-    if (nothingChanged(changes)) return
-    PushNotification.cancelLocalNotification({ id: '2' })
-    if (periodReminderObservable.value.enabled) setupPeriodReminder()
+    if (nothingChanged(changes)) {
+      return
+    }
+
+    updatePeriodNotification()
   })
 }
 
-function setupPeriodReminder() {
-  const PushNotification = Platform.OS === 'ios' ? PN : PN.default
+const updatePeriodNotification = () => {
+  // Cancel any existing period reminder
+  PushNotification.cancelLocalNotification({ id: PERIOD_REMINDER_ID })
+
+  // Set up a new period reminder if enabled
+  if (periodReminderObservable.value.enabled) {
+    schedulePeriodNotification()
+  }
+}
+
+function schedulePeriodNotification() {
   const bleedingPrediction = cycleModule().getPredictedMenses()
+
   if (bleedingPrediction.length > 0) {
     const predictedBleedingStart = Moment(
       bleedingPrediction[0][0],
       'YYYY-MM-DD'
     )
-    // 3 days before and at 6 am
+
+    const advanceNoticeDays = parseInt(advanceNoticeDaysObservable.value, 10)
+
+    // ${advanceNoticeDays} days before and at 6 am
     const reminderDate = predictedBleedingStart
-      .subtract(3, 'days')
+      .subtract(advanceNoticeDays, 'days')
       .hours(6)
       .minutes(0)
       .seconds(0)
 
     if (reminderDate.isAfter()) {
-      // period is likely to start in 3 to 3 + (length of prediction - 1) days
-      const daysToEndOfPrediction = bleedingPrediction[0].length + 2
+      // period is likely to start in advanceNoticeDays to advanceNoticeDays + (length of prediction - 1) days
+      const daysToEndOfPrediction =
+        advanceNoticeDays + bleedingPrediction[0].length - 1
 
       PushNotification.localNotificationSchedule({
-        id: '2',
-        userInfo: { id: '2' },
-        message: labels.periodReminder.notification(daysToEndOfPrediction),
+        id: PERIOD_REMINDER_ID,
+        userInfo: { id: PERIOD_REMINDER_ID },
+        message: labels.periodReminder.notification(
+          advanceNoticeDays,
+          daysToEndOfPrediction
+        ),
         date: reminderDate.toDate(),
         vibrate: false,
-        channelId: 'drip-channel-id',
+        channelId: DRIP_CHANNEL_ID,
         allowWhileIdle: true,
       })
     }
diff --git a/local-storage.js b/local-storage.js
index 66ce305..63bd55a 100644
--- a/local-storage.js
+++ b/local-storage.js
@@ -2,6 +2,8 @@ import AsyncStorage from '@react-native-async-storage/async-storage'
 import Observable from 'obv'
 import { TEMP_SCALE_MIN, TEMP_SCALE_MAX, TEMP_SCALE_UNITS } from './config'
 
+import { ADVANCE_PERIOD_NOTICE_DAYS_INIT_VALUE } from './config'
+
 export const scaleObservable = Observable()
 setObvWithInitValue('tempScale', scaleObservable, {
   min: TEMP_SCALE_MIN,
@@ -59,6 +61,18 @@ export async function savePeriodPrediction(bool) {
   }
 }
 
+export const advanceNoticeDaysObservable = Observable()
+setObvWithInitValue(
+  'advanceNoticeDays',
+  advanceNoticeDaysObservable,
+  parseInt(ADVANCE_PERIOD_NOTICE_DAYS_INIT_VALUE, 10)
+)
+
+export async function saveAdvanceNoticeDays(days) {
+  await AsyncStorage.setItem('advanceNoticeDays', JSON.stringify(days))
+  advanceNoticeDaysObservable.set(days)
+}
+
 export const useCervixAsSecondarySymptomObservable = Observable()
 setObvWithInitValue(
   'useCervixAsSecondarySymptom',
@@ -109,7 +123,7 @@ export async function saveTemperatureTrackingCategory(bool) {
   if (!temperatureTrackingCategoryObservable.value) {
     // if temperature tracking is turned off, the temperature reminder gets disabled
     const tempReminderResult = await AsyncStorage.getItem('tempReminder')
-     if (tempReminderResult && JSON.parse(tempReminderResult).enabled) {
+    if (tempReminderResult && JSON.parse(tempReminderResult).enabled) {
       tempReminderObservable.set(false)
     }
   }