Total Automation, From Settings to SMS.

* Triggers: App, Time, Day, Location, Hard/Soft State, Event, Shortcut, Widget, Timer, Plugins
* Actions: 200+ built-in, plugin support
* Tasks: loops, variables, conditions
* Scenes: design your own screen overlays
* App Creation: create your own standalone apps to share or sell! (Android 2.3+)

Trial: http://tasker.dinglisch.net/dl
Starter Guides: http://tasker.dinglisch.net/guides.html
Queries, Problems: see Menu / Info / Support in-app

It's not possible to fix problems reported via Play Store Comments...

****** Actions By Category ******

[not all actions available on all devices]

* ALERT: Flash, Notify LED/Sound/Vibrate, Cancel Notification, Popup Timed/WithTaskIcons/Names, Torch, Vibrate, Vibrate Pattern
* APP: Calendar Insert, Go Home, Kill App, Load App, Open Map (/StreetView/Nav)
* AUDIO: Alarm/Call/DTMF/Media/Notif./Ringer/System Volume, Haptic Feedback Toggle, Mic Mute, Notification Pulse, Notification(* DIALOG: 28 System Settings dialogs
* DISPLAY: Auto-Brightness, Close System Dialogs, Keyguard, Keyguard Pattern, Display Brightness, Display Off Timeout, Display Rotation, Set Wallpaper, Stay On, Status Bar (expand/collapse), System Lock
* FILE: Browse Files, Directory Create/Delete/Move, File Copy/Delete/Move/Open, Write To File, Read Line, Read Paragraph, Zip/Unzip File
* INPUT: Button, Dpad (root only), Type (root only), Input Method Select, Soft Keyboard (show)
* MEDIA: Media Button Events (grab), Media Player Control, Music File/Dir, Play/Forward/Back/Stop, Photo/Series/TimeSeries, Record Audio, Record Audio Stop, Ringtone, Scan Card
* MISC: (Broadcast) Action Intent, Component Intent, Get Location, GPS Status (* NETWORK: Airplane Mode (* PHONE: Call, Call Log, Call Block/Divert/Revert, Compose MMS/SMS, Contacts, End Call, Radio, Send SMS, Send Data SMS, Silence Ringer, Take Call
* TASKER: Change Icon Set, If, End If, Goto Action, Perform Task, Profile Toggle, Query Action, Set Widget Icon, Set Widget Label, Stop, Wait, Wait Until
* VARIABLES: Set, Clear, Inc, Dec, Query, Randomize, Split, Join, List
* 3RD PARTY: Android Notifier, Astrid, BeyondPod, JuiceDefender Data/Toggle, Gentle Alarm, NewsRob, OfficeTalk, SleepBot, SMS Backup+, TeslaLED, WidgetLocker

****** States ******

Airplane Mode, BT Connected, Calendar Entry, Docked, Headset Plugged, Incoming Call, Keyboard Out, Light Level, Media Button, Missed Call, Mobile Network, Device Orientation, Power, Various Sensors, Signal Strength, Unread Text, Variable Value, Wifi Network, Wifi Near

****** Events ******

Alarm Clock/Done, Date Set, Time/Date Set, Timezone Set, Display: Off/On/Unlocked, File Closed/Deleted/Modified/Moved/Opened/Attributes Changed, Camera/Search Button Long-Press, Card Mounted/Removed/Unmounted, Gesture,Missed Call, Phone Changes, Received Text, SMS Send Success/Failure, Battery Changed/Full/Low/Overheating, Device Boot, Device Shutdown, Storage Low, Locale Changed, New/Removed/Updated Package, Wallpaper Changed, Button Gadget Clicked, New Window, Notification, Notification Clicked, Zoom Click, Variable Cleared/Set, K9 Email Received, Gentle Alarm, Kaloer Clock, OpenWatch, Reddit Notify, Screebl, Widget Locker

Note: Tasker uses the BIND_DEVICE_ADMIN permission in order to provide the System Lock functionality.

Recent changes:
v5.0u6
* color selector for theme accent

v5.0u1,2,3,4,5,6
* bugfixes and minor changes to 5.0

v5.0
* switched to Material Design icon and themes
* improved presentation and UI interaction
* added approx 900 material design icons, freely selectable colours
* added 4 more themes at Prefs / UI / Theme
* support for (customisable) Quick Settings (Android 7.0+) and App Shortcuts (Android 7.1.1+)
* Video scene element with fine control

Details: http://tasker.dinglisch.net/changes/changes5.0.html