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Jargon

Offline reader for the Jargon File, the original hacker culture dictionary
New in version 1.0.2
Fix bright splash screen on cold launch in dark environments.
Add foss/play build flavors ahead of Play Store distribution; F-Droid
builds only ever use the foss flavor.
Jargon is a fully offline reader for the Jargon File — the hacker culture
dictionary that gave the word "hacker" its original meaning, decades before
it came to mean "cracker." Compiled by Eric S. Raymond and Guy L. Steele and
continued today as a community project, it's the closest thing hacking has
to an etymology.

Over 2,300 entries, all bundled in the app:

* Browse alphabetically with a fast-scroll index
* Instant search across terms and definitions
* Tap any cross-referenced term to jump straight to it
* Favorite entries for quick access later
* "Surprise me" with a random entry

Zero permissions. Zero network access, ever — the dictionary ships inside
the app, favorites stay on your device, nothing is ever sent anywhere.
No accounts, no ads, no analytics.

Dictionary content is CC BY-SA 4.0 from the Jargon File community edition
(github.com/agiacalone/jargonfile). App source is GPL-3.0.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 1.0.2 (3) suggested Added on Jul 31, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • com.hackerapps.jargon.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.8 MiB PGP Signature | Build Log

  • New in version 1.0.1
    Remove an unused APK signing-block extra from release builds.
    Internal change, no user-facing effect.
  • Version 1.0.1 (2) - Added on Jul 28, 2026

    arm64-v8a armeabi-v7a x86 x86_64

    This version requires Android 8.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions
    • com.hackerapps.jargon.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 1.8 MiB PGP Signature | Build Log