817 reviews
Content rating
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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
Aug 29, 2023

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

698 reviews
August 5, 2021
I use this for to-do lists, shopping lists, projects, pretty much everything. You can import from just about any other software, and the interface is fantastic. Nested trees, the best drag/drop implementation I've come across on Android period. If you used Treepad you'll feel right at home. One minor thing I wish it had was the capability to backup/restore to Google Drive. If you get the Pro version, you can backup/restore to the internal storage, which is good, and I use it a lot.
7 people found this review helpful
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Jay Gawlikoski
March 29, 2022
Absolutely spectacular app. Easy to use. So many helpful features and just does everything you could ever want when needing to make, edit, and export outlines. I just had a problem where another app restricted Outliner's Internet access causing problems. The developer responded immediately with very knowledgeable and helpful ideas to help me find and solve the problem. This is an extremely high quality app that I've been using extensively for a year. It is so well worth the purchase!! 🙏
4 people found this review helpful
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Vanessa Lupita
June 30, 2021
It's very straight forward and easy to use. The due date function is convenient. However, I wish you could add the time for when something is due. I like the checkmark feature for when you are done and the addition of notes for the activity. I would have like a reminder for each activity that had a due date but for a basic checklist it's pretty good.
2 people found this review helpful
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Alfred Fritz
July 1, 2021
Thank you for your feedback! Outliner's PRO version has notifications for due activities (Settings, General Setting, Notification Policy). http://android-outliner.blogspot.com/p/tutorial.html#579707048 The Todo View may also help: http://android-outliner.blogspot.com/p/tutorial.html#406733531 Due Time already is on the issues list.

What's new

* Library version upgrades
* Android 13 API upgrade
* Android 13, themed app icons
* Text selection, enable Web Search
* Fix: import Treepad, occational errors
* Fix: subtree context menu, wrong title
* Fix: incorrect file permissions on WSA