Signal - Private Messenger v0.5.7
APK · 442.6 KB · version code 21 · Android 1.6+ · uploaded Feb 18, 2012
- Same certificate as v7.9.6, which matches Google Play Details
Quick check before downloading
Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v7.9.6, uploaded Jul 2, 2026 — about 14 years after this one.
- Size: this file is 442.6 KB; the latest is 63.2 MB (62.8 MB larger).
- Android: this version needs Android 1.6+; the latest needs Android 5.0+. Use this one if your device runs an older Android release.
- The latest version asks for 52 more permissions: Approximate location, Precise location, Access notification policy, View Wi-Fi connections, Authenticate accounts, Bluetooth, Broadcast sticky, Camera….
- The latest version no longer asks for: Broadcast wap push, Read sms, Receive mms, Receive sms, Send sms, Modify shared storage, Write sms.
File information
- Version
- v0.5.7 (21)
- Uploaded
- Feb 18, 2012
- Size
- 442.6 KB
- Requires
- Android 1.6+ (API 4)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- d40895a97a1e9484e410efbb2ceebc89
- Signing certificate (SHA-1)
- 45:98:9D:C9:AD:87:28:C2:AA:9A:82:FA:55:50:3E:34:A8:87:93:74
- Signed by
- CN=Whisper Systems, OU=Research and Development, O=Whisper Systems, L=Pittsburgh, ST=PA, C=US
- File name
- org-thoughtcrime-securesms-21-247577-d40895a97a1e9484e410efbb2ceebc89.apk
- Package
- org.thoughtcrime.securesms
- Downloads (all versions)
- 100M+
- Age rating
- PEGI 3 · Everyone
Permissions (17)
This version requests 17 permissions, 8 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Read contacts Sensitive android.permission.READ_CONTACTS
- Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
- Read sms Sensitive android.permission.READ_SMS
- Receive mms Sensitive android.permission.RECEIVE_MMS
- Receive sms Sensitive android.permission.RECEIVE_SMS
- Send sms Sensitive android.permission.SEND_SMS
- Write contacts Sensitive android.permission.WRITE_CONTACTS
- Access secrets (custom) org.thoughtcrime.securesms.ACCESS_SECRETS
- Broadcast wap push android.permission.BROADCAST_WAP_PUSH
- Change network state android.permission.CHANGE_NETWORK_STATE
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Run at startup android.permission.RECEIVE_BOOT_COMPLETED
- View network connections android.permission.ACCESS_NETWORK_STATE
- Write sms android.permission.WRITE_SMS
Security & authenticity
Security rating: Trusted
Signing certificate
- Certificate issued to “Whisper Systems” This is the certificate of the Google Play version.
- Same certificate as v7.9.6, which matches Google Play v7.9.6 · v6.8.3 · v4.36.2 · v1.0.6
Store checks
- Developer signature under review May 5, 2026
- Antivirus scan passed Nov 18, 2020
- Uploaded by “sobetillapeloncete2” 787 followers · uploading since 2011
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (5 other versions compared). AAPKs doesn't scan files itself.
How to install Signal - Private Messenger on Android 1.6+
You'll need about 885.2 KB of free space.
- Download the APK — tap Download APK above (442.6 KB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap org-thoughtcrime-securesms-21-247577-d40895a97a1e9484e410efbb2ceebc89.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be d40895a97a1e9484e410efbb2ceebc89. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open Signal - Private Messenger — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 1.6+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.