diff --git a/components/cycle-day/temperature.js b/components/cycle-day/temperature.js
index 6f87d53..4023d38 100644
--- a/components/cycle-day/temperature.js
+++ b/components/cycle-day/temperature.js
@@ -11,22 +11,23 @@ import Segment from '../common/segment'
 
 import { connect } from 'react-redux'
 import { getDate } from '../../slices/date'
-import { isTemperatureOutOfRange, isPreviousTemperature } from '../helpers/cycle-day'
+import {
+  isTemperatureOutOfRange,
+  getPreviousTemperature,
+} from '../helpers/cycle-day'
 
 import { temperature as labels } from '../../i18n/en/cycle-day'
 
 import { Colors, Containers, Sizes, Spacing } from '../../styles'
 
-const formatTemperature = value => value === null
-  ? value
-  : Number.parseFloat(value).toFixed(2)
+const formatTemperature = (value) =>
+  value === null ? value : Number.parseFloat(value).toFixed(2)
 
 class Temperature extends Component {
-
   static propTypes = {
     data: PropTypes.object,
     date: PropTypes.string.isRequired,
-    save: PropTypes.func
+    save: PropTypes.func,
   }
 
   constructor(props) {
@@ -35,13 +36,13 @@ class Temperature extends Component {
     const { data, date } = this.props
     const { value } = data
     const { shouldShowSuggestion, suggestedTemperature } =
-      isPreviousTemperature(date)
+      getPreviousTemperature(date)
 
     this.state = {
       isTimePickerVisible: false,
       shouldShowSuggestion,
       suggestedTemperature: formatTemperature(suggestedTemperature),
-      value: formatTemperature(value)
+      value: formatTemperature(value),
     }
   }
 
@@ -54,7 +55,7 @@ class Temperature extends Component {
 
     this.setState({
       value: value.trim(),
-      shouldShowSuggestion: false
+      shouldShowSuggestion: false,
     })
   }
 
@@ -80,9 +81,10 @@ class Temperature extends Component {
     const { shouldShowSuggestion, suggestedTemperature, value } = this.state
     const { time } = this.props.data
 
-    const inputStyle = (shouldShowSuggestion && value === null)
-      ? { color: Colors.grey }
-      : {color: Colors.greyDark}
+    const inputStyle =
+      shouldShowSuggestion && value === null
+        ? { color: Colors.grey }
+        : { color: Colors.greyDark }
     const outOfRangeWarning = isTemperatureOutOfRange(value)
     let temperatureToShow = null
 
@@ -109,17 +111,17 @@ class Temperature extends Component {
             />
             <AppText>°C</AppText>
           </View>
-          { outOfRangeWarning !== null &&
+          {outOfRangeWarning !== null && (
             <View style={styles.hintContainer}>
               <AppText style={styles.hint}>{outOfRangeWarning}</AppText>
             </View>
-          }
+          )}
         </Segment>
         <Segment>
           <AppText style={styles.title}>{labels.time}</AppText>
           <AppTextInput
             onFocus={this.onShowTimePicker}
-            testID='timeInput'
+            testID="timeInput"
             value={time}
           />
           <DateTimePicker
@@ -127,7 +129,7 @@ class Temperature extends Component {
             mode="time"
             onConfirm={this.setTime}
             onCancel={this.onCancelTimePicker}
-            display={Platform.OS === "ios" ? "spinner" : "default"}
+            display={Platform.OS === 'ios' ? 'spinner' : 'default'}
           />
         </Segment>
       </React.Fragment>
@@ -137,28 +139,24 @@ class Temperature extends Component {
 
 const styles = StyleSheet.create({
   container: {
-    ...Containers.rowContainer
+    ...Containers.rowContainer,
   },
   hint: {
     fontStyle: 'italic',
-    fontSize: Sizes.small
+    fontSize: Sizes.small,
   },
   hintContainer: {
-    marginVertical: Spacing.tiny
+    marginVertical: Spacing.tiny,
   },
   title: {
-    fontSize: Sizes.subtitle
-  }
+    fontSize: Sizes.subtitle,
+  },
 })
 
-
 const mapStateToProps = (state) => {
-  return({
+  return {
     date: getDate(state),
-  })
+  }
 }
 
-export default connect(
-  mapStateToProps,
-  null,
-)(Temperature)
+export default connect(mapStateToProps, null)(Temperature)
diff --git a/components/helpers/cycle-day.js b/components/helpers/cycle-day.js
index 825d27d..37037f0 100644
--- a/components/helpers/cycle-day.js
+++ b/components/helpers/cycle-day.js
@@ -1,6 +1,6 @@
 import { ChronoUnit, LocalDate, LocalTime } from 'js-joda'
 
-import { getPreviousTemperature, saveSymptom } from '../../db'
+import { getPreviousTemperatureForDate, saveSymptom } from '../../db'
 import { scaleObservable } from '../../local-storage'
 
 import * as labels from '../../i18n/en/cycle-day'
@@ -23,15 +23,16 @@ const temperatureLabels = labels.temperature
 const minutes = ChronoUnit.MINUTES
 
 const isNumber = (value) => typeof value === 'number'
-export const shouldShow = (value) => value !== null ? true : false
+export const shouldShow = (value) => (value !== null ? true : false)
 
-export const isPreviousTemperature = (temperature) => {
-  const previousTemperature = getPreviousTemperature(temperature)
-  const shouldShowSuggestion = previousTemperature ? true : false
-  const suggestedTemperature = previousTemperature ?
-    previousTemperature.toString() : null
+export const formatTemperature = (temperature) =>
+  !temperature
+    ? temperature
+    : Number.parseFloat(temperature.toString()).toFixed(2)
 
-  return { shouldShowSuggestion, suggestedTemperature }
+export const getPreviousTemperature = (date) => {
+  const previousTemperature = getPreviousTemperatureForDate(date)
+  return formatTemperature(previousTemperature)
 }
 
 export const isTemperatureOutOfRange = (temperature) => {
@@ -55,7 +56,7 @@ export const isTemperatureOutOfRange = (temperature) => {
 export const blank = {
   bleeding: {
     exclude: false,
-    value: null
+    value: null,
   },
   cervix: {
     exclude: false,
@@ -64,9 +65,9 @@ export const blank = {
     position: null,
   },
   desire: {
-    value: null
+    value: null,
   },
-  mood:{
+  mood: {
     happy: null,
     sad: null,
     stressed: null,
@@ -77,16 +78,16 @@ export const blank = {
     fatigue: null,
     angry: null,
     other: null,
-    note: null
+    note: null,
   },
   mucus: {
     exclude: false,
     feeling: null,
     texture: null,
-    value: null
+    value: null,
   },
   note: {
-    value: null
+    value: null,
   },
   pain: {
     cramps: null,
@@ -97,7 +98,7 @@ export const blank = {
     tenderBreasts: null,
     migraine: null,
     other: null,
-    note: null
+    note: null,
   },
   sex: {
     solo: null,
@@ -111,14 +112,14 @@ export const blank = {
     diaphragm: null,
     none: null,
     other: null,
-    note: null
+    note: null,
   },
   temperature: {
     exclude: false,
     note: null,
     time: LocalTime.now().truncatedTo(minutes).toString(),
-    value: null
-  }
+    value: null,
+  },
 }
 
 export const symtomPage = {
@@ -126,11 +127,13 @@ export const symtomPage = {
     excludeText: labels.bleeding.exclude.explainer,
     note: null,
     selectBoxGroups: null,
-    selectTabGroups: [{
-      key: 'value',
-      options: getLabelsList(bleedingLabels),
-      title: labels.bleeding.heaviness.explainer,
-    }]
+    selectTabGroups: [
+      {
+        key: 'value',
+        options: getLabelsList(bleedingLabels),
+        title: labels.bleeding.heaviness.explainer,
+      },
+    ],
   },
   cervix: {
     excludeText: cervixLabels.excludeExplainer,
@@ -151,18 +154,20 @@ export const symtomPage = {
         key: 'position',
         options: getLabelsList(cervixLabels.position.categories),
         title: cervixLabels.position.explainer,
-      }
-    ]
+      },
+    ],
   },
   desire: {
     excludeText: null,
     note: null,
     selectBoxGroups: null,
-    selectTabGroups: [{
-      key: 'value',
-      options: getLabelsList(intensityLabels),
-      title: labels.desire.explainer
-    }]
+    selectTabGroups: [
+      {
+        key: 'value',
+        options: getLabelsList(intensityLabels),
+        title: labels.desire.explainer,
+      },
+    ],
   },
   mucus: {
     excludeText: mucusLabels.excludeExplainer,
@@ -178,34 +183,38 @@ export const symtomPage = {
         key: 'texture',
         options: getLabelsList(mucusLabels.texture.categories),
         title: mucusLabels.texture.explainer,
-      }
-    ]
+      },
+    ],
   },
   mood: {
     excludeText: null,
     note: null,
-    selectBoxGroups: [{
-      key: 'mood',
-      options: moodLabels,
-      title: labels.mood.explainer
-    }],
-    selectTabGroups: null
+    selectBoxGroups: [
+      {
+        key: 'mood',
+        options: moodLabels,
+        title: labels.mood.explainer,
+      },
+    ],
+    selectTabGroups: null,
   },
   note: {
     excludeText: null,
     note: noteDescription,
     selectBoxGroups: null,
-    selectTabGroups: null
+    selectTabGroups: null,
   },
   pain: {
     excludeText: null,
     note: null,
-    selectBoxGroups: [{
-      key: 'pain',
-      options: painLabels,
-      title: labels.pain.explainer
-    }],
-    selectTabGroups: null
+    selectBoxGroups: [
+      {
+        key: 'pain',
+        options: painLabels,
+        title: labels.pain.explainer,
+      },
+    ],
+    selectTabGroups: null,
   },
   sex: {
     excludeText: null,
@@ -220,40 +229,42 @@ export const symtomPage = {
         key: 'contraceptives',
         options: contraceptiveLabels,
         title: labels.contraceptives.explainer,
-      }
+      },
     ],
-    selectTabGroups: null
+    selectTabGroups: null,
   },
   temperature: {
     excludeText: temperatureLabels.exclude.explainer,
     note: temperatureLabels.note.explainer,
     selectBoxGroups: null,
-    selectTabGroups: null
-  }
+    selectTabGroups: null,
+  },
 }
 
 export const save = {
   bleeding: (data, date, shouldDeleteData) => {
     const { exclude, value } = data
     const isDataEntered = isNumber(value)
-    const valuesToSave = shouldDeleteData || !isDataEntered
-      ? null : { value, exclude }
+    const valuesToSave =
+      shouldDeleteData || !isDataEntered ? null : { value, exclude }
 
     saveSymptom('bleeding', date, valuesToSave)
   },
   cervix: (data, date, shouldDeleteData) => {
     const { opening, firmness, position, exclude } = data
-    const isDataEntered = ['opening', 'firmness', 'position'].some(
-      value => isNumber(data[value]))
-    const valuesToSave = shouldDeleteData || !isDataEntered
-      ? null : { opening, firmness, position, exclude }
+    const isDataEntered = ['opening', 'firmness', 'position'].some((value) =>
+      isNumber(data[value])
+    )
+    const valuesToSave =
+      shouldDeleteData || !isDataEntered
+        ? null
+        : { opening, firmness, position, exclude }
 
     saveSymptom('cervix', date, valuesToSave)
   },
   desire: (data, date, shouldDeleteData) => {
     const { value } = data
-    const valuesToSave = shouldDeleteData || !isNumber(value)
-      ? null : { value }
+    const valuesToSave = shouldDeleteData || !isNumber(value) ? null : { value }
 
     saveSymptom('desire', date, valuesToSave)
   },
@@ -262,11 +273,18 @@ export const save = {
   },
   mucus: (data, date, shouldDeleteData) => {
     const { feeling, texture, exclude } = data
-    const isDataEntered = ['feeling', 'texture'].some(
-      value => isNumber(data[value]))
-    const valuesToSave = shouldDeleteData || !isDataEntered
-      ? null
-      : { feeling, texture, value: computeNfpValue(feeling, texture), exclude }
+    const isDataEntered = ['feeling', 'texture'].some((value) =>
+      isNumber(data[value])
+    )
+    const valuesToSave =
+      shouldDeleteData || !isDataEntered
+        ? null
+        : {
+            feeling,
+            texture,
+            value: computeNfpValue(feeling, texture),
+            exclude,
+          }
 
     saveSymptom('mucus', date, valuesToSave)
   },
@@ -289,21 +307,20 @@ export const save = {
       exclude,
       note,
       time,
-      value: Number(value)
+      value: Number(value),
     }
 
     saveSymptom(
       'temperature',
       date,
-      (shouldDeleteData || value === null) ? null : valuesToSave
+      shouldDeleteData || value === null ? null : valuesToSave
     )
-  }
+  },
 }
 
 const saveBoxSymptom = (data, date, shouldDeleteData, symptom) => {
-  const isDataEntered = Object.keys(data).some(key => data[key] !== null)
-  const valuesToSave = shouldDeleteData || !isDataEntered
-    ? null : data
+  const isDataEntered = Object.keys(data).some((key) => data[key] !== null)
+  const valuesToSave = shouldDeleteData || !isDataEntered ? null : data
 
   saveSymptom(symptom, date, valuesToSave)
 }
@@ -327,46 +344,59 @@ const label = {
       return temperatureLabel
     }
   },
-  mucus: mucus => {
-    const filledCategories = ['feeling', 'texture'].filter(c => isNumber(mucus[c]))
-    let label = filledCategories.map(category => {
-      return labels.mucus.subcategories[category] + ': ' + labels.mucus[category].categories[mucus[category]]
-    }).join(', ')
+  mucus: (mucus) => {
+    const filledCategories = ['feeling', 'texture'].filter((c) =>
+      isNumber(mucus[c])
+    )
+    let label = filledCategories
+      .map((category) => {
+        return (
+          labels.mucus.subcategories[category] +
+          ': ' +
+          labels.mucus[category].categories[mucus[category]]
+        )
+      })
+      .join(', ')
 
     if (isNumber(mucus.value)) label += `\n => ${labels.mucusNFP[mucus.value]}`
     if (mucus.exclude) label = `(${label})`
 
     return label
   },
-  cervix: cervix => {
-    const filledCategories = ['opening', 'firmness', 'position'].filter(c => isNumber(cervix[c]))
-    let label = filledCategories.map(category => {
-      return labels.cervix.subcategories[category] + ': ' + labels.cervix[category].categories[cervix[category]]
-    }).join(', ')
+  cervix: (cervix) => {
+    const filledCategories = ['opening', 'firmness', 'position'].filter((c) =>
+      isNumber(cervix[c])
+    )
+    let label = filledCategories
+      .map((category) => {
+        return (
+          labels.cervix.subcategories[category] +
+          ': ' +
+          labels.cervix[category].categories[cervix[category]]
+        )
+      })
+      .join(', ')
 
     if (cervix.exclude) label = `(${label})`
 
     return label
   },
-  note: note => note.value,
+  note: (note) => note.value,
   desire: ({ value }) => {
     if (isNumber(value)) {
       return intensityLabels[value]
     }
   },
-  sex: sex => {
+  sex: (sex) => {
     const sexLabel = []
-    if (sex && Object.values({...sex}).some(val => val)){
-      Object.keys(sex).forEach(key => {
-        if(sex[key] && key !== 'other' && key !== 'note') {
-          sexLabel.push(
-            sexLabels[key] ||
-            contraceptiveLabels[key]
-          )
+    if (sex && Object.values({ ...sex }).some((val) => val)) {
+      Object.keys(sex).forEach((key) => {
+        if (sex[key] && key !== 'other' && key !== 'note') {
+          sexLabel.push(sexLabels[key] || contraceptiveLabels[key])
         }
-        if(key === 'other' && sex.other) {
+        if (key === 'other' && sex.other) {
           let label = contraceptiveLabels[key]
-          if(sex.note) {
+          if (sex.note) {
             label = `${label} (${sex.note})`
           }
           sexLabel.push(label)
@@ -375,16 +405,16 @@ const label = {
       return sexLabel.join(', ')
     }
   },
-  pain: pain => {
+  pain: (pain) => {
     const painLabel = []
-    if (pain && Object.values({...pain}).some(val => val)){
-      Object.keys(pain).forEach(key => {
-        if(pain[key] && key !== 'other' && key !== 'note') {
+    if (pain && Object.values({ ...pain }).some((val) => val)) {
+      Object.keys(pain).forEach((key) => {
+        if (pain[key] && key !== 'other' && key !== 'note') {
           painLabel.push(painLabels[key])
         }
-        if(key === 'other' && pain.other) {
+        if (key === 'other' && pain.other) {
           let label = painLabels[key]
-          if(pain.note) {
+          if (pain.note) {
             label = `${label} (${pain.note})`
           }
           painLabel.push(label)
@@ -393,16 +423,16 @@ const label = {
       return painLabel.join(', ')
     }
   },
-  mood: mood => {
+  mood: (mood) => {
     const moodLabel = []
-    if (mood && Object.values({...mood}).some(val => val)){
-      Object.keys(mood).forEach(key => {
-        if(mood[key] && key !== 'other' && key !== 'note') {
+    if (mood && Object.values({ ...mood }).some((val) => val)) {
+      Object.keys(mood).forEach((key) => {
+        if (mood[key] && key !== 'other' && key !== 'note') {
           moodLabel.push(moodLabels[key])
         }
-        if(key === 'other' && mood.other) {
+        if (key === 'other' && mood.other) {
           let label = moodLabels[key]
-          if(mood.note) {
+          if (mood.note) {
             label = `${label} (${mood.note})`
           }
           moodLabel.push(label)
@@ -410,7 +440,7 @@ const label = {
       })
       return moodLabel.join(', ')
     }
-  }
+  },
 }
 
 export const getData = (symptom, symptomData) => {
diff --git a/db/index.js b/db/index.js
index f1ab4a4..d721a64 100644
--- a/db/index.js
+++ b/db/index.js
@@ -11,7 +11,7 @@ let db
 let checkIsMensesStart
 let getMensesDaysRightAfter
 
-export async function openDb (hash) {
+export async function openDb(hash) {
   const realmConfig = {}
   if (hash) {
     realmConfig.encryptionKey = hashToInt8Array(hash)
@@ -22,7 +22,7 @@ export async function openDb (hash) {
   let tempConnection
   try {
     tempConnection = await Realm.open(realmConfig)
-  } catch(err) {
+  } catch (err) {
     const isErrorDecrypting = err.toString().includes('decrypt')
     const isErrorMnemonic = err.toString().includes('Invalid mnemonic')
     // tried to open without password, but is encrypted or incorrect pwd
@@ -36,20 +36,16 @@ export async function openDb (hash) {
   let nextSchemaIndex = Realm.schemaVersion(Realm.defaultPath)
   tempConnection.close()
   while (nextSchemaIndex < schemas.length - 1) {
-    const tempConfig = Object.assign(
-      realmConfig,
-      schemas[nextSchemaIndex++]
-    )
+    const tempConfig = Object.assign(realmConfig, schemas[nextSchemaIndex++])
     const migratedRealm = new Realm(tempConfig)
     migratedRealm.close()
   }
 
   // open the Realm with the latest schema
   realmConfig.schema = schemas[schemas.length - 1]
-  const connection = await Realm.open(Object.assign(
-    realmConfig,
-    schemas[schemas.length - 1]
-  ))
+  const connection = await Realm.open(
+    Object.assign(realmConfig, schemas[schemas.length - 1])
+  )
 
   db = connection
   const cycle = cycleModule()
@@ -63,17 +59,26 @@ export function closeDb() {
 }
 
 export function getBleedingDaysSortedByDate() {
-  return db.objects('CycleDay').filtered('bleeding != null').sorted('date', true)
+  return db
+    .objects('CycleDay')
+    .filtered('bleeding != null')
+    .sorted('date', true)
 }
 export function getTemperatureDaysSortedByDate() {
-  return db.objects('CycleDay').filtered('temperature != null').sorted('date', true)
+  return db
+    .objects('CycleDay')
+    .filtered('temperature != null')
+    .sorted('date', true)
 }
 export function getCycleDaysSortedByDate() {
   return db.objects('CycleDay').sorted('date', true)
 }
 
 export function getCycleStartsSortedByDate() {
-  return db.objects('CycleDay').filtered('isCycleStart = true').sorted('date', true)
+  return db
+    .objects('CycleDay')
+    .filtered('isCycleStart = true')
+    .sorted('date', true)
 }
 export function saveSymptom(symptom, date, val) {
   let cycleDay = getCycleDay(date)
@@ -83,7 +88,10 @@ export function saveSymptom(symptom, date, val) {
     if (symptom === 'bleeding') {
       const mensesDaysAfter = getMensesDaysRightAfter(cycleDay)
       maybeSetNewCycleStart({
-        val, cycleDay, mensesDaysAfter, checkIsMensesStart
+        val,
+        cycleDay,
+        mensesDaysAfter,
+        checkIsMensesStart,
       })
     } else {
       cycleDay[symptom] = val
@@ -93,7 +101,7 @@ export function saveSymptom(symptom, date, val) {
 
 export function updateCycleStartsForAllCycleDays() {
   db.write(() => {
-    getBleedingDaysSortedByDate().forEach(day => {
+    getBleedingDaysSortedByDate().forEach((day) => {
       if (checkIsMensesStart(day)) {
         day.isCycleStart = true
       }
@@ -106,7 +114,7 @@ export function createCycleDay(dateString) {
   db.write(() => {
     result = db.create('CycleDay', {
       date: dateString,
-      isCycleStart: false
+      isCycleStart: false,
     })
   })
   return result
@@ -116,9 +124,9 @@ export function getCycleDay(dateString) {
   return db.objectForPrimaryKey('CycleDay', dateString)
 }
 
-export function getPreviousTemperature(date) {
+export function getPreviousTemperatureForDate(date) {
   const targetDate = LocalDate.parse(date)
-  const winner = getTemperatureDaysSortedByDate().find(candidate => {
+  const winner = getTemperatureDaysSortedByDate().find((candidate) => {
     return LocalDate.parse(candidate.date).isBefore(targetDate)
   })
   if (!winner) return null
@@ -171,10 +179,13 @@ export function tryToImportWithoutDelete(cycleDays) {
 }
 
 export function requestHash(type, pw) {
-  nodejs.channel.post('request-SHA512', JSON.stringify({
-    type: type,
-    message: pw
-  }))
+  nodejs.channel.post(
+    'request-SHA512',
+    JSON.stringify({
+      type: type,
+      message: pw,
+    })
+  )
 }
 
 export async function changeEncryptionAndRestartApp(hash) {
@@ -199,7 +210,7 @@ export async function changeEncryptionAndRestartApp(hash) {
   restart.Restart()
 }
 
-export function isDbEmpty () {
+export function isDbEmpty() {
   return db.empty
 }