Anti-Features are flags packagers apply to apps, warning of possibly undesirable behaviour from the user’s perspective, often serving the interest of the developer or a third party.
You will see these in the F-Droid client, and/or web repository browser when viewing the details of an app containing one or more of these Anti-Features.
List of Anti-Features
F-Droid currently uses this list of Anti-Features for labeling apps we are shipping:
- Ads - advertising
- Tracking - tracks and/or reports your activity to somewhere, even when it can be turned off
- Non-Free Network Services - promotes or depends entirely on a non-libre network service
- Non-Free Addons - promotes other non-libre apps or plugins
- Non-Free Dependencies - needs a non-libre app to work (e.g. Google Maps, Market)
- Upstream Non-Free - upstream source code is not libre, and this version has those parts replaced or rewritten
- Non-Free Assets - non-libre media in things that are not code (e.g. images, sound, music, 3D-models, or video)
- Known Vulnerability - known security vulnerability
- Disabled Algorithm - signed using an unsafe algorithm
- No Source Since - source code no longer available, making new releases impossible
Here’s a complete list of all apps in F-Droid containing Anti-Features.
This Anti-Feature is applied to an app that contains advertising.
Note that most applications that contain advertising are not Free Software, because they use proprietary software (e.g. AdMob) to provide that advertising. Those apps will not be found in the repo at all, so the only time you would see this Anti-Feature applied would be an app that contains advertising without using Non-Free Software to do it. No such apps are currently known to exist.
Here’s the list of apps with Ads.
This Anti-Feature is applied to apps that track you and/or report your activity to somewhere, either without your permission or by default (i.e. you’d have to actively seek out an option to disable it).
Examples of where this Anti-Feature might be applied:
- Sending crash reports without your knowledge or permission
- Checking for updates without your knowledge or permission
Examples of where it would not be applied - any of the above, if the functionality is opt-in (i.e. you are asked before it happens) or disabled by default.
Note that frequently app tracking is implemented using proprietary software, e.g. Google Analytics or Flurry. Apps containing these proprietary libraries will not be found in the F-Droid repo.
Here’s the list of apps with Tracking.
This Anti-Feature is applied to apps that promote or depend entirely on a Non-Free network service.
Here’s the list of apps with Non-Free Network Services.
This Anti-Feature is applied to apps that, although Free Software themselves, promote other Non-Free applications or plugins.
Here’s the list of apps with Non-Free Addons.
This Anti-Feature is applied to apps that require things that are not Free Software in order to run.
This does not mean that proprietary software is included in the app, but for example, it may depend on other software already being installed on your device. A common example would be an app that doesn’t run, or is not useful, unless you have Google Maps installed.
Here’s the list of apps with Non-Free Dependencies.
This Anti-Feature is applied to apps where the upstream source code includes proprietary software by default in their own releases.
This does not mean that proprietary software is included in the app. Most likely, the F-Droid build has been patched in some way to remove the Non-Free code/libraries, and/or some functionality may be missing. The app’s description will usually go into more detail about this.
In our experience, where the upstream developer includes Non-Free libraries, sooner or later they will include more Non-Free libraries, or other Anti-Features. Frequently they become impossible to maintain/update in F-Droid. If there is an alternative, it is recommended that you avoid applications with this Anti-Feature if future updates are important to you.
Here’s the list of apps with Upstream Non-Free.
This Anti-Feature is applied to apps that contain and make use of Non-Free assets. The most common case is apps using artwork - images, sounds, music, etc. - under a non-commercial license.
Here’s the list of apps with Non-Free Assets.
This Anti-Feature is applied to apps with a known security vulnerability, found by one of the scanners in fdroidserver.
Here’s the list of apps with Known Vulnerabilities.
This Anti-Feature is applied to apps that were signed using a signature algorithm that is considered outdated or unsafe.
Here’s the list of apps signed with Disabled Algorithms.
The upstream source for this app is no longer available. Either the app went proprietary, the source repository was dropped, or it has moved to a location currently not known to us. This means there will not be further updates unless the source reappears.
Here’s a list of apps with No Source.
While our package maintainers are working hard to find all Anti-Features and bring them to your attention, some might remain unnoticed or slip in with an app update. Should you discover that an app contains an Anti-Feature F-Droid is not aware of, please report it. You can submit them by E-Mail to email@example.com or open an issue here: gitlab.com/fdroid/fdroiddata/issues.