Halkyon is a spaced-repetition app for your own material: studysets of flashcards, notes, learning paths and PDFs, reviewed on an FSRS schedule. Every studyset is made by its learners: build yours for any subject, or copy one that someone published. It works offline and syncs between your devices.
Learn from what you watch: play films and shows from your Jellyfin server, and every subtitle line is split into dictionary words, with readings above and the translation below. Tap a word, and it is a flashcard.
Dictionaries for Japanese, Chinese, Korean, German, Greek and English; kanji, hanzi and Hangul written by hand, each stroke checked; exam plans for the JLPT, HSK and Korean levels, with a daily pace to your exam's date; and studysets published to Explore and copied, later releases coming in as merges that keep your own edits.
You sign in with SimpleLogin, by Proton, or with an email address, a password and an authenticator app. It connects to halkyon.li, the project's instance, or to any other: everything an instance needs is in the repository, to run your own. The app is AGPL-3.0 and the server SSPL-1.0, so all of its code is public.
Questions and reports: support@halkyon.app
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Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
Snap is available for CentOS 7.6+, and Red Hat Enterprise Linux 7.6+, from the Extra Packages for Enterprise Linux (EPEL) repository. The EPEL repository can be added to your system with the following command:
sudo yum install epel-release
Snap can now be installed as follows:
sudo yum install snapd
Once installed, the systemd unit that manages the main snap communication socket needs to be enabled:
sudo systemctl enable --now snapd.socket
To enable classic snap support, enter the following to create a symbolic link between /var/lib/snapd/snap and /snap:
sudo ln -s /var/lib/snapd/snap /snap
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
To install Halkyon, simply use the following command:
sudo snap install halkyon --edge
Browse and find snaps from the convenience of your desktop using the snap store snap.
Interested to find out more about snaps? Want to publish your own application? Visit snapcraft.io now.