When comparing Tasker vs FairEmail, the Slant community recommends Tasker for most people. In the question“What are the best Android apps?” Tasker is ranked 2nd while FairEmail is ranked 7th. The most important reason people chose Tasker is:
Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.
Specs
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Pros
Pro Infinitely tweakable
Tasker has an impressive amount of triggers, actions, and parameters that can be used together in an incredible variety of ways. It can even accept scripts to follow instructions.
Pro Create powerful custom applications
Tasker has the ability to create custom applications, effectively replacing multiple installed apps in your phone with tasks that are triggered automatically. What's even better is that they will be custom tailored to fit your specific needs.
Pro Can adjust system software
With Root access it can also dabble with system software which other apps are not likely to achieve at the moment.
Pro Export tasks as standalone apps
Tasker allows exporting workflows you've created as standalone applications that can then be shared or even put on the Google Play store.
Pro Awesome plugin support
Tasker has awesome plugin support to connect with hardware that usually requires installing specific apps. For example, it has a plugin for Pebble smartwatch so that you can automate tasks that require using Pebble.
Pro Purchase only once
The dev does not keep bringing out revised apps expecting you to pay each and every time; the same app has been developed consistently for nearly a decade.
Pro Open source
Pro Multiple account support
Multiple identities per account, notifications per account or contact.
Pro Actively maintained
It is actively maintained. The used libraries are up to date and bugs are fixed quickly.
Pro Privacy-Focused
There are no trackers within the app and trackers sent with mails are disabled by default. This app lets you read and compose emails with your privacy in your very own hands.
Pro Fast and customizable
Privacy features are excellent.
Pro Lightweight
~ 20 MB.
Pro Identities support
Pro Two way synchronization
Pro Flat conversation threading
Pro Encryption support
Supports both OpenPGP and S/MIME encryption for total privacy.
Pro Support for safety and low-bandwidth
Allows to configure maximum size of email downloaded immediately.
Pro Can show plain text of html mails
Pro Show links before opening
Some HTML mails may show different links and link texts, this app however will show you the real link before opening, protecting against phishing and scams
Pro Recognize spoofing internationalized domain names
Some domain names may use non-ASCII characters looking similar to the latin alphabet (e.g. some cyrillic characters). This app will show you the punycode representation of the domain, if that is the case and thus protect you against phishing and scams.
Pro Reformat the HTML mail for increased privacy
Some HTML mails may include ressources that can track you. This app doesn't load them by default, but reformats the text, increasing both privacy and readability.
Pro Autoconfiguration with open standards
There are open standards for any email provider to show how an email client should connect to the server. This app supports both RFC 6186 as well as Thunderbird Autoconfiguration standards.
Pro OAuth support for most common mail providers
Supports authenticating with the mail server using OAuth, thus increasing security.
Pro Low RAM usage at the right setings
Cons
Con Awful user interface
While it's incredibly powerful, Tasker's user interface is counter-intuitive, confusing, and just plain clunky at every turn.
Con Steep learning curve
Tasker lacks good documentation or tutorials, which is important as the learning curve is very high if you want to use its advance features where this app actually shines.