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Mobile app · Security & privacy

BLACKBOX

BLACKBOX is a file encryption mobile app, available on Android: data encryption and offline use.

  • Completely free
  • Android
  • Open source
  • No account

Overview

BLACKBOX is a file encryption mobile app, available on Android. Other documented uses: two-factor codes.

Features described in its F-Droid listing and in its GitHub repository: data encryption and offline use.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “File Encryption & Vault” — F-Droid, 10 November 2026
  • “AES-256 encrypted secrets manager, journal, 2FA authenticator, and privacy tools — 100% on-device, zero cloud.” — GitHub, 10 November 2026
  • “AES-256 encrypted secrets manager, journal, 2FA authenticator, and privacy tools — 100% on-device, zero cloud.” — GitHub, 10 November 2026
  • “BLACKBOX is a clean, lightweight, offline-first security hub built for developers, creators, and anyone who values digital privacy.” — F-Droid, 10 November 2026

At a glance

All of BLACKBOX is free: no feature is locked behind a paid plan, and its code is open.

Its licence (MIT) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

  • Open source code
  • No account needed
  • No advertising
  • Commercial use allowed

Sources and checks

  • Facts collected from GitHub (credit card, account, source code, publisher, licence, free status, platforms, commercial use) —
  • Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) —
  • Last technical check: 5 November 2026
  • Listing written automatically from verified facts.

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