826 reviews
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About this app

Organize shopping lists, tasks, todo-lists, ideas and all kinds of memos. Or use Outliner as a project management tool.
Do everything in a tree-structure with collapsable nodes.


* unlimited number of outlines
* collapsable tree-structure
* todo view
* status
* due date
* import (csv, Natara Bonsai, Treepad HJT, Treeline TRLN, OPML, plain text)
* export (csv, Natara Bonsai)
* configurable outfit
* quick edit
* swipe to move activities left or right
* move mode
* drag & drop
* colors
* languages: english, german, french, italian, japanese, spanish, russian, korean

Features PRO version:

* export HTML
* import/export (csv, Natara Bonsai, Treepad HJT, Treeline TRLN, OPML, plain text)
* sync Google Tasks (2 levels)
* sync Natara Bonsai (USB and Dropbox)
* sync Treepad (HJT, USB and Dropbox)
* sync Treeline (TRLN, USB and Dropbox)
* sync OPML (USB and Dropbox) (e.g. OmniOutliner)
* open Outlines with FileManagers or cloud Apps (e.g. BoxCryptor, ownCloud, EDS TrueCrypt)
* automatically finish branch (optional)
* additional view: Show Due, Show #Hashtag
* uncheck finished activities
* delete finished activities
* search
* backup/restore all Outlines to/from SD-card
* backup to Dropbox (optional)
* launcher shortcuts for Outlines
* themes
* cut/copy/paste subtree (also between Outlines)
* expand/collapse subtree
* sort subtree
* share subtree
* zoom into subtree
* configure default view for activity list
* sharing target for texts
* share Outlines
* notification for due activities
* Sort Order Outline List
* Filter Outline List
* Rich Text (format activity notes)


* Storage: access SD card for import/export/sync/backup
* Contacts: find your Google account for Google Tasks Sync
* Run At Startup: to renew backup schedule when booting
* Network Access: for synchronization (Dropbox, Google Tasks)
* Install Shortcuts: for a launcher shortcut to an outline
* Read Log Information: to send an optional log file to the developer
* Run Foreground Service: nightly backups and due notifications
* Notifications: show notification while syncing or if errors occur

Even if the official permission for account info is named "Contacts", Outliner does not and is not even able to read your contacts. Outliner just can list the Google Accounts on your device so that you are able to choose one for Google Tasks sync.
If you deny this permission, Outliner works normally but you can't use Google Tasks Sync.

PRO version:

To get the PRO features please install "Outliner Pro Key" from the Google Play store.
Updated on
Feb 18, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

704 reviews
A Google user
December 17, 2018
I was never able to create useful outlines until outline programs/apps became available. Finally, I was able to restructure hierarchies without tearing up each draft. They are very useful in capturing unstructured ideas, and then forming them into logical structures. My favorite was, and continues to be, ECCO PRO, a discontinued Windows program. Unfortunately, no one has reverse engineered ECCO PRO to run on Android devices, such as my cell phone. This "Outliner" is the best Android substitute I could find. I often reccomend it to others.
10 people found this review helpful
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Tom Farrell
October 5, 2022
This app is incredibly powerful and flexible yet easy to use. It can be utilized for so many things, from keeping track of key information in one's life to simple task management to plotting out an entire screenplay. I've tested out literally dozens of outliner and task management apps and this is by far my favorite! I should mention also that the app's developer is readily accessible, happy to assist and open to user feedback and feature requests. All incredible for an app which is 100% free!
5 people found this review helpful
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May 15, 2022
This is the 2nd or 3rd time I downloaded and tried Outliner, but until now I couldn't get past those huge 3D buttons. This time I purchased the Pro version (only $5), then wrote the developer to ask for smaller buttons. People - if there is something in this app that is holding you back, I urge you to contact Freddy (yup, we're on a 1st name basis now). You will not be disappointed.
5 people found this review helpful
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What's new

* Level Colors, repeat next 6 levels
* Outline Edit new: OK + Sibling
* OK+Next changed to OK>>
* OK>> always edits next activity
* PRO: Search, highlite found text
* PRO: Move mode, cut/copy/paste
* Move mode, material buttons
* Fix: Sync Treeline, doubled GUIDs
* Fix: Sync Dropbox, frozen wait window
* Fix: Search, expand parents
* Fix: stability improvements