Semaphore app icon

Semaphore

Descriptions of signals, indicators and more, applicable to the railroad.

Stowarzyszenie Koleje Wirtualne · com.goss.sem

Not rated yet 50K+ downloads v4.0.0 20.4 MB Android 7.0+ PEGI 3 · Everyone

  • 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

New features: - React JS library, - night mode + signal response to mode, - English language, - semaphores layouts, - selection of signals, indicators from a list, - zoom graphics, - guidance/help, - signal Sz, - fixed warning and shunting dial, - train signals from switch, - signalling cooperation, Changes: - Application UI, - grouping of indicators, - new sounds, - shaped semaphore has the possibility to display signal Sz, - change of application icon,

Description

From the listing uploaded by “appupdater”.

The Semaphore app provides quick and easy access to descriptions of signals displayed on semaphores and signals. With this application you will learn about the regulations, signals and indicators on the railroad infrastructure, wherever and whenever you need it. A convenient and user-friendly interface will allow you to view any signal you are interested in. Virtual semaphores show specific signals, their corresponding definitions, a description of where the signal occurs, and the speed at which you can travel by it. In addition, the application includes a successively updated database of indicators and signals used on the railroad infrastructure. The application does not contain ads and is free. Comments on the application, its future development or corrections are very welcome. Currently supported are: - variable cell and appearance layouts for: -> semaphores, -> ABS (Automatic Block Signals), -> repeater signals, -> light warning signals, -> light shunting dials, -> shaped semaphores, - alternate signal signaling, - crossing warning shield, - light and shaped shunting disc, - shaped warning discs stationary, two-valve and three-valve, - shaped shunting disc, - shaped barrier shield, - all general operating indicators, ETCS, overhead line, - other indicators, - signals given by vehicles and persons, - cooperation of signals, Application authors: Piotr Goss (Pitkowa Kolej) Mateusz Chworak

Version history

2 versions are listed, going back to v3.3.1. Since v4.0.0 it requires Android 7.0+.

All 2 versions

Security & authenticity

Security rating: Trusted

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.

Required hardware & features

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.

Tags

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