Download Reader

Why a direct download, for now

Reader isn't on the Google Play Store yet — publishing under an organization account requires a D-U-N-S verification step that's currently in progress. Until that clears, this direct APK is the real build, signed with the same upload key that will sign the Play Store release. The checksum above lets you confirm the file you downloaded matches exactly what we published, byte for byte.

Verify the signature

Reader's release APKs are signed with our upload key. Its certificate fingerprint is:

2F:39:E0:41:02:94:48:CF:AF:01:29:E4:34:AE:2E:6A:AC:14:EA:55:95:46:9B:FB:32:D7:75:1E:7A:26:B7:A7

You can confirm a downloaded APK was signed with this key using apksigner verify --print-certs (part of the Android SDK build tools) and comparing the SHA-256 it prints against the value above.

Installing from outside the Play Store

1. Download the APK using the button above and confirm the SHA-256 checksum matches.
2. Open the downloaded file. On Android 13 and later, your browser or file manager will ask for permission to install unknown apps — this is a per-app permission, not a global device setting, and only applies to the app you grant it to.
3. Tap "Settings" in that prompt, enable "Allow from this source," then go back and tap Install.
4. On older Android versions, enable it once under Settings → Security → Install unknown apps instead.

Android's Play Protect scans sideloaded apps at install time, the same as apps from the Play Store.