lock
box

Install on Android

Same encrypted box, with native screenshot detection and share-target integration. Sideload — no Play Store, no account needed.

download Download box.apk
photo_camera
ChatGPT-style screenshot preview Take a screenshot, switch to box, see the preview chip with Upload / Discard. No clipboard tricks needed.
share
Share target From any app: Share → box → file is end-to-end encrypted and uploaded.
lock
Same encryption AES-GCM-256 with PBKDF2 (600k iterations). Passphrase never leaves the device. Identical to the web app.

Install steps

  1. Tap Download box.apk above. Chrome may warn "this type of file can harm your device" — tap Download anyway (it's signed by us, not Play Store).
  2. Open the downloaded APK from Notifications or Files.
  3. Android asks "Install unknown apps?" — grant once for Chrome / Files.
  4. Tap Install → Open.
  5. On first launch grant Photos & media permission so screenshots can be detected.

Prefer the web version? Open box in browser →

box-android v1.0.0 · 4.5 MB · arm64 + arm + x86_64 · min Android 8