Knock on Ports is an open-source (Apache-2.0) Android app by Alexander Yaburov. The APK we host is 8.1 MB, it needs Android 7.0 or newer, and it declares 9 permissions.
The file on this page is Knock on Ports 2.1.10, 8.11 MB, and it installs on Android 7.0 and newer.
We compared the signing certificate of this build with the certificate recorded the first time me.impa.knockonports entered the site, and published both the file's SHA-256 and the certificate's fingerprint above so you can check the download yourself. That comparison says the file was not repackaged by someone else; it is not a review of what the app does.
The manifest inside the APK declares 9 permissions, none of which cover contacts, location, SMS, the camera or the microphone.
Its licence is Apache-2.0. We took this build from F-Droid, and the source for this exact version is linked below.
We do not show a star rating or an install count for this page: we have no measured figure for either, and a number we cannot source is worth less than an empty field.
- Version
- 2.1.10
- Size
- 8.11 MB
- Requires Android
- API 24
- Package
- me.impa.knockonports
- Signature checked on
- Sep 19, 2026
- Where this file came from
- F-Droid
- Licence
- Apache-2.0
- Source code
- Source for this version
File SHA-256: 687c38eae29852e1544269be2816050aac8398ed08e8e08dc6a705f35df2592c
Signing certificate (SHA-256): 168f6f6555a8438f8dac959eb886112e33e1beec22e910ebba62f3b8299f3a3f
We check that this file carries the same signing certificate as earlier releases of the same package. That shows the APK was not repackaged by someone else — it is not a security review of the app.
Declared permissions
- ACCESS_NETWORK_STATE
- INTERNET
- FOREGROUND_SERVICE
- POST_NOTIFICATIONS
- USE_BIOMETRIC
- USE_FINGERPRINT
- WAKE_LOCK
- RECEIVE_BOOT_COMPLETED
- me.impa.knockonports.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Screenshots
