
Semaphore
Descriptions of signals, indicators and more, applicable to the railroad.
Stowarzyszenie Koleje Wirtualne · com.goss.sem
- Signature matches the Google Play version Details
At a glance
- Latest version
- v4.0.0 (17)
- Updated
- Jan 5, 2026 (9 months ago)
- APK size
- 20.4 MB
- Requires
- Android 7.0+ (API 24)
- CPU support
- Any (no native code)
- Category
- Education (app)
- Listed since
- Apr 26, 2022 (at least)
- Permissions
- 2
- Website
- facebook.com/railwayproject
- Developer contact
- [email protected]
- Privacy
- Developer's privacy policy
About this APK
Semaphore is an app by Stowarzyszenie Koleje Wirtualne in the Education category, listed since at least April 2022. It has no native code, so it runs on any Android processor.
Since version 3.3.1, the minimum Android version rose from 6.0 to 7.0. It asks for 2 permissions, none of them sensitive. Compared with version 3.3.1, it drops 3 permissions: “View network connections”, “In-app purchases” and “Advertising ID”.
What's new in v4.0.0
Description
From the listing uploaded by “appupdater”.
Version history
2 versions are listed, going back to v3.3.1. Since v4.0.0 it requires Android 7.0+.
Security & authenticity
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jan 5, 2026.
- Certificate issued to “Piotr Goss” This is the certificate of the Google Play version.
- Same certificate as the other version checked
Store checks and file details
- Developer signature verified Jan 5, 2026
- Validated against Google Play Jan 5, 2026
- Signed byCN=Piotr Goss, L=?wi?ta Katarzyna, C=55-010
- Signing certificate (SHA-1)42:45:98:45:5C:E8:E0:28:F0:C1:79:41:4C:F6:78:B5:07:C8:03:B4
- File MD5a2c0e4e491cef4a0c84ae3e1ba8719fe
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (1 other version compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.
Permissions (2)
Semaphore requests 2 permissions, none of them sensitive.
- Full network access android.permission.INTERNET
- Internal broadcast protection (app-defined) com.goss.sem.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Required hardware & features
- Basic touch input android.hardware.faketouch
Semaphore APK: questions and answers
Is there a version of Semaphore for older Android phones?
The current version needs Android 7.0 or later. Version 3.3.1 is the newest listed build that installs on Android 6.0 and later. Get version 3.3.1 · All versions
Can I install this APK over the version I already have?
Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.
Is the Semaphore APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the other version checked. After downloading, check that the file's MD5 is a2c0e4e491cef4a0c84ae3e1ba8719fe.