diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4adee417f..9523c1b69 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
 - [Backup NG] Explicit error if a VM is missing [#3434](https://github.com/vatesfr/xen-orchestra/issues/3434) (PR [#3522](https://github.com/vatesfr/xen-orchestra/pull/3522))
 - [Backup NG] Show all advanced settings with non-default values in overview [#3549](https://github.com/vatesfr/xen-orchestra/issues/3549) (PR [#3554](https://github.com/vatesfr/xen-orchestra/pull/3554))
 - [Backup NG] Collapse advanced settings by default [#3551](https://github.com/vatesfr/xen-orchestra/issues/3551) (PR [#3559](https://github.com/vatesfr/xen-orchestra/pull/3559))
+- [Scheduling] Merge selection and interval tabs [#1902](https://github.com/vatesfr/xen-orchestra/issues/1902) (PR [#3519](https://github.com/vatesfr/xen-orchestra/pull/3519))
 
 ### Bug fixes
 
diff --git a/packages/xo-web/src/common/form/index.js b/packages/xo-web/src/common/form/index.js
index 126247aef..077371e4b 100644
--- a/packages/xo-web/src/common/form/index.js
+++ b/packages/xo-web/src/common/form/index.js
@@ -92,15 +92,16 @@ export class Range extends Component {
     max: PropTypes.number.isRequired,
     min: PropTypes.number.isRequired,
     onChange: PropTypes.func,
+    required: PropTypes.boolean,
     step: PropTypes.number,
     value: PropTypes.number,
   }
 
   componentDidMount () {
-    const { min, onChange, value } = this.props
+    const { min, onChange, required, value } = this.props
 
-    if (!value) {
-      onChange && onChange(min)
+    if (value === undefined && required) {
+      onChange !== undefined && onChange(min)
     }
   }
 
diff --git a/packages/xo-web/src/common/intl/messages.js b/packages/xo-web/src/common/intl/messages.js
index 20216dd1a..884583d0d 100644
--- a/packages/xo-web/src/common/intl/messages.js
+++ b/packages/xo-web/src/common/intl/messages.js
@@ -251,19 +251,11 @@ const messages = {
   // --- Dates/Scheduler ---
 
   schedulingMonth: 'Month',
-  schedulingEveryNMonth: 'Every N month',
-  schedulingEachSelectedMonth: 'Each selected month',
   schedulingDay: 'Day',
-  schedulingEveryNDay: 'Every N day',
-  schedulingEachSelectedDay: 'Each selected day',
   schedulingSetWeekDayMode: 'Switch to week days',
   schedulingSetMonthDayMode: 'Switch to month days',
   schedulingHour: 'Hour',
-  schedulingEachSelectedHour: 'Each selected hour',
-  schedulingEveryNHour: 'Every N hour',
   schedulingMinute: 'Minute',
-  schedulingEachSelectedMinute: 'Each selected minute',
-  schedulingEveryNMinute: 'Every N minute',
   selectTableAllMonth: 'Every month',
   selectTableAllDay: 'Every day',
   selectTableAllHour: 'Every hour',
diff --git a/packages/xo-web/src/common/scheduling.js b/packages/xo-web/src/common/scheduling.js
index 69ba5a18d..5a6a8bfdd 100644
--- a/packages/xo-web/src/common/scheduling.js
+++ b/packages/xo-web/src/common/scheduling.js
@@ -2,14 +2,14 @@ import classNames from 'classnames'
 import PropTypes from 'prop-types'
 import React from 'react'
 import { createSchedule } from '@xen-orchestra/cron'
-import { forEach, includes, isArray, map, sortedIndex } from 'lodash'
 import { FormattedDate, FormattedTime } from 'react-intl'
+import { injectState, provideState } from '@julien-f/freactal'
+import { flatten, forEach, identity, isArray, map, sortedIndex } from 'lodash'
 
 import _ from './intl'
 import Button from './button'
 import Component from './base-component'
 import TimezonePicker from './timezone-picker'
-import Icon from './icon'
 import Tooltip from './tooltip'
 import { Card, CardHeader, CardBlock } from './card'
 import { Col, Row } from './grid'
@@ -25,10 +25,10 @@ const PREVIEW_SLIDER_STYLE = { width: '400px' }
 
 const UNITS = ['minute', 'hour', 'monthDay', 'month', 'weekDay']
 
-const MINUTES_RANGE = [2, 30]
-const HOURS_RANGE = [2, 12]
-const MONTH_DAYS_RANGE = [2, 15]
-const MONTHS_RANGE = [2, 6]
+const MINUTES_RANGE = [1, 30]
+const HOURS_RANGE = [1, 12]
+const MONTH_DAYS_RANGE = [1, 15]
+const MONTHS_RANGE = [1, 6]
 
 const MIN_PREVIEWS = 5
 const MAX_PREVIEWS = 20
@@ -146,7 +146,8 @@ export class SchedulePreview extends Component {
             min={MIN_PREVIEWS}
             max={MAX_PREVIEWS}
             onChange={this.linkState('value')}
-            value={+value}
+            value={value && +value}
+            required
           />
         </div>
         <ul className='list-group'>
@@ -193,47 +194,30 @@ class ToggleTd extends Component {
 
 // ===================================================================
 
-class TableSelect extends Component {
-  static propTypes = {
-    labelId: PropTypes.string.isRequired,
-    options: PropTypes.array.isRequired,
-    optionRenderer: PropTypes.func,
-    onChange: PropTypes.func.isRequired,
-    value: PropTypes.array.isRequired,
-  }
-
-  static defaultProps = {
-    optionRenderer: value => value,
-  }
-
-  _reset = () => {
-    this.props.onChange([])
-  }
-
-  _handleChange = (tdId, tdValue) => {
-    const { props } = this
-
-    const newValue = props.value.slice()
-    const index = sortedIndex(newValue, tdId)
-
-    if (tdValue) {
-      // Add
-      if (newValue[index] !== tdId) {
-        newValue.splice(index, 0, tdId)
-      }
-    } else {
-      // Remove
-      if (newValue[index] === tdId) {
-        newValue.splice(index, 1)
-      }
-    }
-
-    props.onChange(newValue)
-  }
-
-  render () {
-    const { labelId, options, optionRenderer, value } = this.props
-
+const TableSelect = [
+  provideState({
+    effects: {
+      onChange: (_, tdId, add) => (_, { value, onChange }) => {
+        const newValue = [...value]
+        const index = sortedIndex(newValue, tdId)
+        if (add) {
+          newValue[index] !== tdId && newValue.splice(index, 0, tdId)
+        } else {
+          newValue[index] === tdId && newValue.splice(index, 1)
+        }
+        onChange(newValue)
+      },
+      selectAll: () => ({ optionsValues }, { onChange }) => {
+        onChange(optionsValues)
+      },
+    },
+    computed: {
+      optionsValues: (_, { options }) => flatten(options),
+    },
+  }),
+  injectState,
+  ({ state, effects, labelId, options, optionRenderer = identity, value }) => {
+    let k = 0
     return (
       <div>
         <table className='table table-bordered table-sm'>
@@ -245,147 +229,103 @@ class TableSelect extends Component {
                     children={optionRenderer(tdOption)}
                     tdId={tdOption}
                     key={tdOption}
-                    onChange={this._handleChange}
-                    value={includes(value, tdOption)}
+                    onChange={effects.onChange}
+                    value={
+                      k < value.length && value[k] === tdOption && (++k, true)
+                    }
                   />
                 ))}
               </tr>
             ))}
           </tbody>
         </table>
-        <Button className='pull-right' onClick={this._reset}>
-          {_(`selectTableAll${labelId}`)}{' '}
-          {value && !value.length && <Icon icon='success' />}
+        <Button className='pull-right' onClick={effects.selectAll}>
+          {_(`selectTableAll${labelId}`)}
         </Button>
       </div>
     )
-  }
+  },
+].reduceRight((value, decorator) => decorator(value))
+
+TableSelect.propTypes = {
+  labelId: PropTypes.string.isRequired,
+  options: PropTypes.array.isRequired,
+  optionRenderer: PropTypes.func,
+  onChange: PropTypes.func.isRequired,
+  value: PropTypes.array.isRequired,
 }
 
 // ===================================================================
 
-// "2,7" => [2,7]   "*/2" => 2   "*" => []
-const cronToValue = (cron, range) => {
-  if (cron.indexOf('/') === 1) {
-    return +cron.split('/')[1]
-  }
+const TimePicker = [
+  provideState({
+    effects: {
+      onChange: (_, value) => ({ optionsValues }, { onChange }) => {
+        if (isArray(value)) {
+          value = value.length === optionsValues.length ? '*' : value.join(',')
+        } else {
+          value = `*/${value}`
+        }
 
-  if (cron === '*') {
-    return []
-  }
+        onChange(value)
+      },
+    },
+    computed: {
+      step: (_, { value }) =>
+        value.indexOf('/') === 1 ? +value.split('/')[1] : undefined,
+      optionsValues: (_, { options }) => flatten(options),
 
-  return map(cron.split(','), Number)
-}
+      // '*' or '*/1' => all values
+      // '2,7' => [2,7]
+      // '*/2' => [min + 2 * 0, min + 2 * 1, ..., min + 2 * n <= max]
+      tableValue: ({ optionsValues, step }, { value }) =>
+        value === '*' || step === 1
+          ? optionsValues
+          : step !== undefined
+            ? optionsValues.filter((_, i) => i % step === 0)
+            : value.split(',').map(Number),
 
-// [2,7] => "2,7"   2 => "*/2"   [] => "*"
-const valueToCron = value => {
-  if (!isArray(value)) {
-    return `*/${value}`
-  }
+      // '*' => 1
+      // '*/2' => 2
+      rangeValue: ({ step }, { value }) => (value === '*' ? 1 : step),
+    },
+  }),
+  injectState,
+  ({ state, effects, ...props }) => (
+    <Card>
+      <CardHeader>
+        {_(`scheduling${props.labelId}`)}
+        {props.headerAddon}
+      </CardHeader>
+      <CardBlock>
+        <TableSelect
+          labelId={props.labelId}
+          onChange={effects.onChange}
+          optionRenderer={props.optionRenderer}
+          options={props.options}
+          value={state.tableValue}
+        />
+        {props.range !== undefined && (
+          <Range
+            max={props.range[1]}
+            min={props.range[0]}
+            onChange={effects.onChange}
+            value={state.rangeValue}
+          />
+        )}
+      </CardBlock>
+    </Card>
+  ),
+].reduceRight((value, decorator) => decorator(value))
 
-  if (!value.length) {
-    return '*'
-  }
-
-  return value.join(',')
-}
-
-class TimePicker extends Component {
-  static propTypes = {
-    headerAddon: PropTypes.node,
-    optionRenderer: PropTypes.func,
-    onChange: PropTypes.func.isRequired,
-    range: PropTypes.array,
-    labelId: PropTypes.string.isRequired,
-    value: PropTypes.any.isRequired,
-  }
-
-  _update = cron => {
-    const { tableValue, rangeValue } = this.state
-
-    const newValue = cronToValue(cron)
-    const periodic = !isArray(newValue)
-
-    this.setState({
-      periodic,
-      tableValue: periodic ? tableValue : newValue,
-      rangeValue: periodic ? newValue : rangeValue,
-    })
-  }
-
-  componentWillReceiveProps (props) {
-    if (props.value !== this.props.value) {
-      this._update(props.value)
-    }
-  }
-
-  componentDidMount () {
-    this._update(this.props.value)
-  }
-
-  _onChange = value => {
-    this.props.onChange(valueToCron(value))
-  }
-
-  _tableTab = () => this._onChange(this.state.tableValue || [])
-  _periodicTab = () =>
-    this._onChange(this.state.rangeValue || this.props.range[0])
-
-  render () {
-    const { headerAddon, labelId, options, optionRenderer, range } = this.props
-
-    const { periodic, tableValue, rangeValue } = this.state
-
-    return (
-      <Card>
-        <CardHeader>
-          {_(`scheduling${labelId}`)}
-          {headerAddon}
-        </CardHeader>
-        <CardBlock>
-          {range && (
-            <ul className='nav nav-tabs mb-1'>
-              <li className='nav-item'>
-                <a
-                  onClick={this._tableTab}
-                  className={classNames('nav-link', !periodic && 'active')}
-                  style={CLICKABLE}
-                >
-                  {_(`schedulingEachSelected${labelId}`)}
-                </a>
-              </li>
-              <li className='nav-item'>
-                <a
-                  onClick={this._periodicTab}
-                  className={classNames('nav-link', periodic && 'active')}
-                  style={CLICKABLE}
-                >
-                  {_(`schedulingEveryN${labelId}`)}
-                </a>
-              </li>
-            </ul>
-          )}
-          {periodic ? (
-            <Range
-              ref='range'
-              min={range[0]}
-              max={range[1]}
-              onChange={this._onChange}
-              value={rangeValue}
-            />
-          ) : (
-            <TableSelect
-              labelId={labelId}
-              onChange={this._onChange}
-              options={options}
-              optionRenderer={optionRenderer}
-              value={tableValue || []}
-            />
-          )}
-        </CardBlock>
-      </Card>
-    )
-  }
+TimePicker.propTypes = {
+  headerAddon: PropTypes.node,
+  labelId: PropTypes.string.isRequired,
+  onChange: PropTypes.func.isRequired,
+  optionRenderer: PropTypes.func,
+  options: PropTypes.array.isRequired,
+  range: PropTypes.array,
+  value: PropTypes.string.isRequired,
 }
 
 const isWeekDayMode = ({ monthDayPattern, weekDayPattern }) => {
@@ -420,12 +360,7 @@ class DayPicker extends Component {
   }
 
   _onChange = cron => {
-    const isMonthDayPattern = !this.state.weekDayMode || includes(cron, '/')
-
-    this.props.onChange([
-      isMonthDayPattern ? cron : '*',
-      isMonthDayPattern ? '*' : cron,
-    ])
+    this.props.onChange(this.state.weekDayMode ? ['*', cron] : [cron, '*'])
   }
 
   render () {
@@ -453,11 +388,10 @@ class DayPicker extends Component {
         headerAddon={dayModeToggle}
         key={weekDayMode ? 'week' : 'month'}
         labelId='Day'
+        onChange={this._onChange}
         optionRenderer={weekDayMode ? getDayName : undefined}
         options={weekDayMode ? WEEK_DAYS : DAYS}
-        onChange={this._onChange}
         range={MONTH_DAYS_RANGE}
-        setWeekDayMode={this._setWeekDayMode}
         value={weekDayMode ? weekDayPattern : monthDayPattern}
       />
     )